// 使用方法
// a.exe < input.txt

#include <stdio.h>

int main()
{
  int count[256] = {0}, i,j;
  char c;

  while ((c = getchar()) != EOF) {
    if (c >= 'a' && c <= 'z') {
      count[c - '\0']++;
    }

  }
  for ( i = 0; i < 256; ++i) {
    if (count[i]) {
      printf("%c : ", '\0' + i);
      for ( j = count[i]; j--;) {
        putchar('*');
      }
      putchar('\n');
    }
  }

  return 0;
}