import java.util.*;
  public class Main{
      public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int[] counter  =new int[30];
        
        int i;
        while(sc.hasNext()){
        String str = sc.next();
        String str_low  =str.toLowerCase();
        for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      }
      }
        for(i=97;i<123;i++){
          System.out.printf("%c : %d\n",i,counter[i-97]);
        }
      }
    } import java.util.*; util.* java public class Main{
      public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int[] counter  =new int[30];
        
        int i;
        while(sc.hasNext()){
        String str = sc.next();
        String str_low  =str.toLowerCase();
        for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      }
      }
        for(i=97;i<123;i++){
          System.out.printf("%c : %d\n",i,counter[i-97]);
        }
      }
    } Main public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int[] counter  =new int[30];
        
        int i;
        while(sc.hasNext()){
        String str = sc.next();
        String str_low  =str.toLowerCase();
        for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      }
      }
        for(i=97;i<123;i++){
          System.out.printf("%c : %d\n",i,counter[i-97]);
        }
      } main {
        Scanner sc = new Scanner(System.in);
        int[] counter  =new int[30];
        
        int i;
        while(sc.hasNext()){
        String str = sc.next();
        String str_low  =str.toLowerCase();
        for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      }
      }
        for(i=97;i<123;i++){
          System.out.printf("%c : %d\n",i,counter[i-97]);
        }
      } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] counter  =new int[30]; counter new int[30] 30 int i; i while(sc.hasNext()){
        String str = sc.next();
        String str_low  =str.toLowerCase();
        for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      }
      } sc.hasNext() sc.hasNext sc {
        String str = sc.next();
        String str_low  =str.toLowerCase();
        for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      }
      } String str = sc.next(); str sc.next() sc.next sc String str_low  =str.toLowerCase(); str_low str.toLowerCase() str.toLowerCase str for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      } i=0; i=0 i 0 i<str.length() i str.length() str.length str i++ i++ i {
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      } {
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      } char value = str_low.charAt(i); value str_low.charAt(i) str_low.charAt str_low i if(value<123 && value>=97){
          counter[value-97]++;
        } value<123 && value>=97 value<123 value 123 value>=97 value 97 {
          counter[value-97]++;
        } counter[value-97]++ counter[value-97] counter value-97 value 97 for(i=97;i<123;i++){
          System.out.printf("%c : %d\n",i,counter[i-97]);
        } i=97; i=97 i 97 i<123 i 123 i++ i++ i {
          System.out.printf("%c : %d\n",i,counter[i-97]);
        } {
          System.out.printf("%c : %d\n",i,counter[i-97]);
        } System.out.printf("%c : %d\n",i,counter[i-97]) System.out.printf System.out System System.out "%c : %d\n" i counter[i-97] counter i-97 i 97 String args[] args public class Main{
      public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int[] counter  =new int[30];
        
        int i;
        while(sc.hasNext()){
        String str = sc.next();
        String str_low  =str.toLowerCase();
        for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      }
      }
        for(i=97;i<123;i++){
          System.out.printf("%c : %d\n",i,counter[i-97]);
        }
      }
    } public class Main{
      public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int[] counter  =new int[30];
        
        int i;
        while(sc.hasNext()){
        String str = sc.next();
        String str_low  =str.toLowerCase();
        for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      }
      }
        for(i=97;i<123;i++){
          System.out.printf("%c : %d\n",i,counter[i-97]);
        }
      }
    } Main
import java.util.*;
  public class Main{
      public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int[] counter  =new int[30];
        
        int i;
        while(sc.hasNext()){
        String str = sc.next();
        String str_low  =str.toLowerCase();
        for(i=0;i<str.length();i++){
          
          
          char value = str_low.charAt(i);
          if(value<123 && value>=97){
          counter[value-97]++;
        }
      }
      }
        for(i=97;i<123;i++){
          System.out.printf("%c : %d\n",i,counter[i-97]);
        }
      }
    }
