
import java.util.*;
class Main {
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);
        int cnt[] = new int[26];
        String alphabet="abcdefghijklmnopqrstuvwxyz";
        for(int i=0; i<26; i++)
        {
            cnt[i]=0;
        }
        char ch;
        while(scan.hasNext())
        {
            String text = scan.next();
            for(int i=0; i<text.length(); i++)
            {
                ch=text.charAt(i);
                int n=ch-'A';
                if(n<64 && n>=0) {
                    n=n%32;
                    if(n>=0 && n<26) {
                        cnt[n]++;
                    }
                }
            }
        }
        for(int i=0; i<26; i++)
        {
            System.out.println(alphabet.charAt(i)+" : "+cnt[i]);
        }
        scan.close();

    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz