#include<cstdio>
#include<string>
using namespace std ;
int main(){
int ASCA[26]={'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
char arr[200];
scanf("%s",arr);
string buf = arr;
arr[buf.size()-1] = '\0';
int count[26] = {0};
for(int i = 0 ;i < 26 ; ++ i){
for(int j = 0 ; j < buf.size() ; ++j) {
if (ASCA[i] == buf[j]) {
++count[i];
} else {
count[i] = count[i];
}
}
}
for(int i= 0 ; i < 26; ++i) {
printf("%c:%d\n", ASCA[i], count[i]);
}
}



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