#include <stdio.h>

int main() {
  int i,j;
  for (i=1; i<=10; i++) 
    for (j=1; j<=10; j++)
      printf("%2dx%1d=%2d%c",i,j,i*j,j==10?'\n':' ');
  printf("\n");

  i=1; 
  do {
    j=1;
    do
      printf("%2dx%1d=%2d%c",i,j,i*j,j==10?'\n':' ');
    while (++j<=10);
  } while (++i<=10);
  printf("\n");

  i=0;
  while (++i<=10) {
    j=0;
    while (++j<=10)
      printf("%2dx%1d=%2d%c",i,j,i*j,j==10?'\n':' ');
  }
  printf("\n");

  i=0;
  for (;;) {
    if (++i>10) break;
    j=0;
    for (;;) {
      if (++j>10) break;
      printf("%2dx%1d=%2d%c",i,j,i*j,j==10?'\n':' ');
    }
  }
  printf("\n");

  for (i=1; i<=10; i++) 
    for (j=1; j<=10; j++) 
      if (i%3==0 || i%5==0 || j%3==0 || j%5==0)
	printf("%2dx%1d=%2d%c",i,j,i*j,j==10?'\n':' ');
      else
	printf("-------%c",j==10?'\n':' ');	
  printf("\n");
}