#if defined(__STDC__) && !defined(__HIGHC__)
#include <stdlib.h>
#endif
#include <stdio.h>
#include <math.h>

main(void){
	int a;	  /* first digit */
	int b;	  /* second digit */
	int c;	  /* third digit */
	int d;	  /* fourth digit */
	int e = 1;  /* first digit */
	int f = 1;  /* second digit */
	int g = 1;  /* third digit */
	int h = 1;  /* fourth digit */
	int i = 3;  /* first counter */
	int j = 3;  /* second counter */
	int k = 3;  /* third counter */
	int l = 3;  /* fourth counter */
	int n = 1;	/* counter for displaying output */
	int z = 0;	/* too many numbers flag */
	int p = 0;	/* wait until entry is correct */
	double v, w, x, y;	/* fun with divison */
	double r, s, t, u;
	int q;	/* input variable */

	/* get the 4 digit number */
	while (p <= 0 ){	
		printf("Enter the last four digits of a phone number >");
		scanf("%d", &q);
		p = 1;
		if (q >= 10000) {
			z = 1;
			p = 0;
			printf("Gol durnit! Der Number's too big, Jah see...why not give it another go?\nWith four numbers only this time, too.\n");
			}
		}
		
	/* make it into 4 numbers */
	v = q; 
	r = (v) / (1000);
	a = floor(r);

	w = q;
	s = ((w) / (100)) - (a * 10);
	b = floor(s);
	
	x = q;
	t = ((x) / (10)) - ((a * 100) + (b * 10));
	c = floor(t);

	y = q;
	u = (y) - ((a * 1000) + (b * 100) + (c * 10));
	d = floor(u);

	/* check for special cases such as 1, 9 & 0 */
	if ( a == 1 ) {
		i = 1;
		}
	if ( b == 1 ) {
		j = 1;
		}
	if ( c == 1 ) {
		k = 1;
		}
	if ( d == 1 ) {
		l = 1;
		}

	if ( a == 9 ) {
		i = 4;
		}
	if ( b == 9 ) {
		j = 4;
		}
	if ( c == 9 ) {
		k = 4;
		}
	if ( d == 9 ) {
		l = 4;
		}
		
	if ( a == 0 ) {
		i = 1;
		}
	if ( b == 0 ) {
		j = 1;
		}
	if ( c == 0 ) {
		k = 1;
		}
	if ( d == 0 ) {
		l = 1;
		}
		
	/* print the number entered */
	printf("%d", a );
	printf("%d", b );
	printf("%d", c );
	printf("%d spells:\n", d );
	
	/* begin the combinatorics */
	while (e <= i){
		while ( f <= j ) {
			while ( g <= k ) {
				while ( h <= l ) {
					/* begin As */
					if ( a == 1 ) {
						printf("1");
						}
					if ( a == 2 ) {
						if ( e == 1 ) {
							printf("A");
							}
						if ( e == 2 ) {
							printf("B");
							}
						if ( e == 3 ) {
							printf("C");
							}
						}
					if ( a == 3 ) {
						if ( e == 1 ) {
							printf("D");
							}
						if ( e == 2 ) {
							printf("E");
							}
						if ( e == 3 ) {
							printf("F");
							}
						}
					if ( a == 4 ) {
						if ( e == 1 ) {
							printf("G");
							}
						if ( e == 2 ) {
							printf("H");
							}
						if ( e == 3 ) {
							printf("I");
							}
						}
					if ( a == 5 ) {
						if ( e == 1) {
							printf("J");
							}
						if ( e == 2 ) {
							printf("K");
							}
						if ( e == 3 ) {
							printf("L");
							}
						}
					if ( a == 6 ) {
						if ( e == 1) {
							printf("M");
							}
						if ( e == 2 ) {
							printf("N");
							}
						if ( e == 3 ) {
							printf("O");
							}
						}
					if ( a == 7 ) {
						if ( e == 1) {
							printf("P");
							}
						if ( e == 2 ) {
							printf("R");
							}
						if ( e == 3 ) {
							printf("S");
							}
						}
					if ( a == 8 ) {
						if ( e == 1) {
							printf("T");
							}
						if ( e == 2 ) {
							printf("U");
							}
						if ( e == 3 ) {
							printf("V");
							}
						}
					if ( a == 9 ) {
						if ( e == 1 ) {
							printf("W");
							}
						if ( e == 2 ) {
							printf("X");
							}
						if ( e == 3 ) {
							printf("Y");
							}
						if ( e == 4 ) {
							printf("Z");
							}
						}
					if ( a == 0 ) {
						printf("0");
						}
						/* end As */
						/* start Bs */
					if ( b == 1 ) {
						printf("1");
						}
					if ( b == 2 ) {
						if ( f == 1 ) {
								printf("A");
							}
						if ( f == 2 ) {
							printf("B");
							}
						if ( f == 3 ) {
							printf("C");
							}
						}
					if ( b == 3 ) {
						if ( f == 1 ) {
							printf("D");
							}
						if ( f == 2 ) {
							printf("E");
							}
						if ( f == 3 ) {
							printf("F");
							}
						}
					if ( b == 4 ) {
						if ( f == 1 ) {
							printf("G");
							}
						if ( f == 2 ) {
							printf("H");
							}
						if ( f == 3 ) {
							printf("I");
							}
						}
					if ( b == 5 ) {
						if ( f == 1) {
							printf("J");
							}
						if ( f == 2 ) {
							printf("K");
							}
						if ( f == 3 ) {
							printf("L");
							}
						}
					if ( b == 6 ) {
						if ( f == 1) {
							printf("M");
							}
						if ( f == 2 ) {
							printf("N");
							}
						if ( f == 3 ) {
							printf("O");
							}
						}
					if ( b == 7 ) {
						if ( f == 1) {
							printf("P");
							}
						if ( f == 2 ) {
							printf("R");
							}
						if ( f == 3 ) {
							printf("S");
							}
						}
					if ( b == 8 ) {
						if ( f == 1) {
							printf("T");
							}
						if ( f == 2 ) {
							printf("U");
							}
						if ( f == 3 ) {
							printf("V");
							}
						}
					if ( b == 9 ) {
						if ( f == 1 ) {
							printf("W");
							}
						if ( f == 2 ) {
							printf("X");
							}
						if ( f == 3 ) {
							printf("Y");
							}
						if ( f == 4 ) {
							printf("Z");
							}
						}
					if ( b == 0 ) {
						printf("0");
						}
					/* end Bs */
					/* start Cs */
					if ( c == 1 ) {
						printf("1");
						}
					if ( c == 2 ) {
						if ( g == 1 ) {
							printf("A");
							}
						if ( g == 2 ) {
							printf("B");
							}
						if ( g == 3 ) {
							printf("C");
							}
						}
					if ( c == 3 ) {
						if ( g == 1 ) {
							printf("D");
							}
						if ( g == 2 ) {
							printf("E");
							}
						if ( g == 3 ) {
							printf("F");
							}
						}
					if ( c == 4 ) {
						if ( g == 1 ) {
							printf("G");
							}
						if ( g == 2 ) {
							printf("H");
							}
						if ( g == 3 ) {
							printf("I");
							}
						}
					if ( c == 5 ) {
						if ( g == 1) {
							printf("J");
							}
						if ( g == 2 ) {
							printf("K");
							}
						if ( g == 3 ) {
							printf("L");
							}
						}
					if ( c == 6 ) {
						if ( g == 1) {
							printf("M");
							}
						if ( g == 2 ) {
							printf("N");
							}
						if ( g == 3 ) {
							printf("O");
							}
						}
					if ( c == 7 ) {
						if ( g == 1) {
							printf("P");
							}
						if ( g == 2 ) {
							printf("R");
							}
						if ( g == 3 ) {
							printf("S");
							}
						}
					if ( c == 8 ) {
						if ( g == 1) {
							printf("T");
							}
						if ( g == 2 ) {
							printf("U");
							}
						if ( g == 3 ) {
							printf("V");
							}
						}
					if ( c == 9 ) {
						if ( g == 1 ) {
							printf("W");
							}
						if ( g == 2 ) {
							printf("X");
							}
						if ( g == 3 ) {
							printf("Y");
							}
						if ( g == 4 ) {
							printf("Z");
							}
						}
					if ( c == 0 ) {
						printf("0");
						}
					/* end Cs */
					/* start Ds */
					if ( d == 1 ) {
						printf("1");
						}
					if ( d == 2 ) {
						if ( h == 1 ) {
							printf("A");
							}
						if ( h == 2 ) {
							printf("B");
							}
						if ( h == 3 ) {
							printf("C");
							}
						}
					if ( d == 3 ) {
						if ( h == 1 ) {
							printf("D");
							}
						if ( h == 2 ) {
							printf("E");
							}
						if ( h == 3 ) {
							printf("F");
							}
						}
					if ( d == 4 ) {
						if ( h == 1 ) {
							printf("G");
							}
						if ( h == 2 ) {
							printf("H");
							}
						if ( h == 3 ) {
							printf("I");
							}
						}
					if ( d == 5 ) {
						if ( h == 1) {
							printf("J");
							}
						if ( h == 2 ) {
							printf("K");
							}
						if ( h == 3 ) {
							printf("L");
							}
						}
					if ( d == 6 ) {
						if ( h == 1) {
							printf("M");
							}
						if ( h == 2 ) {
							printf("N");
							}
						if ( h == 3 ) {
							printf("O");
							}
						}
					if ( d == 7 ) {
						if ( h == 1) {
							printf("P");
							}
						if ( h == 2 ) {
							printf("R");
							}
						if ( h == 3 ) {
							printf("S");
							}
						}
					if ( d == 8 ) {
						if ( h == 1) {
							printf("T");
							}
						if ( h == 2 ) {
							printf("U");
							}
						if ( h == 3 ) {
							printf("V");
							}
						}
					if ( d == 9 ) {
						if ( h == 1 ) {
							printf("W");
							}
						if ( h == 2 ) {
							printf("X");
							}
						if ( h == 3 ) {
							printf("Y");
							}
						if ( h == 4 ) {
							printf("Z");
							}
						}
					if ( d == 0 ) {
						printf("0");
						}
					/* end Ds */
					printf(", ");	/* put in a space */
					n = n + 1;		/* more convenient line breaks */
					if ( n >= 10 ) {
						printf("\n");
						n = 1;
						}
					h = h + 1;
					}
				h = 1;
				g = g + 1;
				}
			g = 1;
			f = f + 1;
			}
		f = 1;
		e = e + 1;
	}
}