import java.io.*;
import java.util.Arrays;
class Main{
    public static void main(String[] args) throws IOException {
        int i,tmp;
        int[] A = new int[100];
        String str;
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        for(;(str=in.readLine())!=null;){
            char[] c = str.toCharArray();
            for(i=0;i<c.length;i++){
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            }
        }
        for(i=0;i<26;i++){
            System.out.println((char)(97+i)+" : "+A[i]);
        } 
        System.out.flush();
    }
} import java.io.*; io.* java import java.util.Arrays; Arrays java.util class Main{
    public static void main(String[] args) throws IOException {
        int i,tmp;
        int[] A = new int[100];
        String str;
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        for(;(str=in.readLine())!=null;){
            char[] c = str.toCharArray();
            for(i=0;i<c.length;i++){
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            }
        }
        for(i=0;i<26;i++){
            System.out.println((char)(97+i)+" : "+A[i]);
        } 
        System.out.flush();
    }
} Main public static void main(String[] args) throws IOException {
        int i,tmp;
        int[] A = new int[100];
        String str;
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        for(;(str=in.readLine())!=null;){
            char[] c = str.toCharArray();
            for(i=0;i<c.length;i++){
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            }
        }
        for(i=0;i<26;i++){
            System.out.println((char)(97+i)+" : "+A[i]);
        } 
        System.out.flush();
    } main {
        int i,tmp;
        int[] A = new int[100];
        String str;
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        for(;(str=in.readLine())!=null;){
            char[] c = str.toCharArray();
            for(i=0;i<c.length;i++){
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            }
        }
        for(i=0;i<26;i++){
            System.out.println((char)(97+i)+" : "+A[i]);
        } 
        System.out.flush();
    } int i i tmp; tmp int[] A = new int[100]; A new int[100] 100 String str; str BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); in new BufferedReader(new InputStreamReader(System.in)) for(;(str=in.readLine())!=null;){
            char[] c = str.toCharArray();
            for(i=0;i<c.length;i++){
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            }
        } ; (str=in.readLine())!=null (str=in.readLine()) str in.readLine() in.readLine in null {
            char[] c = str.toCharArray();
            for(i=0;i<c.length;i++){
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            }
        } {
            char[] c = str.toCharArray();
            for(i=0;i<c.length;i++){
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            }
        } char[] c = str.toCharArray(); c str.toCharArray() str.toCharArray str for(i=0;i<c.length;i++){
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            } i=0; i=0 i 0 i<c.length i c.length c c.length i++ i++ i {
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            } {
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            } tmp = (int)c[i] tmp (int)c[i] c i if(64 < tmp && tmp <91) tmp+=32; 64 < tmp && tmp <91 64 < tmp 64 tmp tmp <91 tmp 91 tmp+=32 tmp 32 tmp-=97 tmp 97 if(tmp < 0 || 27 < tmp) continue; tmp < 0 || 27 < tmp tmp < 0 tmp 0 27 < tmp 27 tmp continue; A[tmp]+=1 A[tmp] A tmp 1 for(i=0;i<26;i++){
            System.out.println((char)(97+i)+" : "+A[i]);
        } i=0; i=0 i 0 i<26 i 26 i++ i++ i {
            System.out.println((char)(97+i)+" : "+A[i]);
        } {
            System.out.println((char)(97+i)+" : "+A[i]);
        } System.out.println((char)(97+i)+" : "+A[i]) System.out.println System.out System System.out (char)(97+i)+" : "+A[i] (char)(97+i)+" : "+A[i] (char)(97+i) 97 i " : " A[i] A i System.out.flush() System.out.flush System.out System System.out String[] args args
import java.io.*;
import java.util.Arrays;
class Main{
    public static void main(String[] args) throws IOException {
        int i,tmp;
        int[] A = new int[100];
        String str;
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        for(;(str=in.readLine())!=null;){
            char[] c = str.toCharArray();
            for(i=0;i<c.length;i++){
                tmp = (int)c[i];
                if(64 < tmp && tmp <91) tmp+=32;
                tmp-=97;
                if(tmp < 0 || 27 < tmp) continue;
                A[tmp]+=1;
            }
        }
        for(i=0;i<26;i++){
            System.out.println((char)(97+i)+" : "+A[i]);
        } 
        System.out.flush();
    }
}