#include <stdio.h>
#include <ctype.h>
#include <string.h>
void count_letters(count char*str){
    int counts[26]={0};
    for(int i=0;str[i];i++){
        char c=tolower(str[i]);
        if(isalpha(c)){
            counts[c-'a']++
        }else if(!isspace(c)){
            printf("Input contains digits or special characters:\n");
            return;
        }
    }
    for(int i=0;i<26;i++){
        if(counts[i]>0){
            printf("%c%d",'A'+i,counts[i]);
        }
    }
    printf("\n");
}
int main(){
    char input[100];
    fgets(input,sizeof(input),stdin);
    input[strcspn(input,"\n")]=0;
    count_letters(input);
    return 0;
}