/* Count both uppercase and lowercase letters separately. */

#include <stdio.h>
#include <ctype.h>

int main(void)
{
   int   c, i, uc_letter[26], lc_letter[26];

   for (i = 0; i < 26; ++i){        /* init array to zero*/
     uc_letter[i] = 0; lc_letter[i] = 0; 
   }

   while ((c = getchar()) != EOF)  /* count the letters */
      if (isupper(c))
         ++uc_letter[c - 'A'];
      else if (islower(c))
         ++lc_letter[c - 'a'];

   for (i = 0; i < 26; ++i) {      /* print the results */
      if (i % 3 == 0)
         printf("\n");
      printf("%4c:%3d", 'A' + i, uc_letter[i]);
      printf("%4c:%3d", 'a' + i, lc_letter[i]);
   }

   printf("\n\n");
   return 0;
}