#include<stdio.h> int main() { char zf; int a[26]={},i; while(scanf("%c",&zf)!=EOF){ if(zf>='a'&&zf<='z'){ a[zf-97]++; } } for(i=0;i<26;i++){ if(a[i]!=0){ printf("%c:%d\n",(char)(i+97),a[i]); } } }