import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    int[] chars = new int[256];
    while(scanner.hasNextLine()){
      String line = scanner.nextLine();
      for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      }
    }
    for(char ch = 'a'; ch <= 'z'; ch++){
      System.out.println(ch + " : " + chars[ch]);
    }
  }
} import java.util.*; util.* java public class Main{
  public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    int[] chars = new int[256];
    while(scanner.hasNextLine()){
      String line = scanner.nextLine();
      for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      }
    }
    for(char ch = 'a'; ch <= 'z'; ch++){
      System.out.println(ch + " : " + chars[ch]);
    }
  }
} Main public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    int[] chars = new int[256];
    while(scanner.hasNextLine()){
      String line = scanner.nextLine();
      for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      }
    }
    for(char ch = 'a'; ch <= 'z'; ch++){
      System.out.println(ch + " : " + chars[ch]);
    }
  } main {
    Scanner scanner = new Scanner(System.in);
    int[] chars = new int[256];
    while(scanner.hasNextLine()){
      String line = scanner.nextLine();
      for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      }
    }
    for(char ch = 'a'; ch <= 'z'; ch++){
      System.out.println(ch + " : " + chars[ch]);
    }
  } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int[] chars = new int[256]; chars new int[256] 256 while(scanner.hasNextLine()){
      String line = scanner.nextLine();
      for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      }
    } scanner.hasNextLine() scanner.hasNextLine scanner {
      String line = scanner.nextLine();
      for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      }
    } String line = scanner.nextLine(); line scanner.nextLine() scanner.nextLine scanner for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      } int i = 0; int i = 0; i 0 i < line.length() i line.length() line.length line i++ i++ i {
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      } {
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      } char c = line.toLowerCase().charAt(i); c line.toLowerCase().charAt(i) line.toLowerCase().charAt line.toLowerCase() line.toLowerCase line i for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        } char j = 'a'; char j = 'a'; j 'a' j <= 'z' j 'z' j++ j++ j {
          if(c == j) chars[j] += 1;
        } {
          if(c == j) chars[j] += 1;
        } if(c == j) chars[j] += 1; c == j c j chars[j] += 1 chars[j] chars j 1 for(char ch = 'a'; ch <= 'z'; ch++){
      System.out.println(ch + " : " + chars[ch]);
    } char ch = 'a'; char ch = 'a'; ch 'a' ch <= 'z' ch 'z' ch++ ch++ ch {
      System.out.println(ch + " : " + chars[ch]);
    } {
      System.out.println(ch + " : " + chars[ch]);
    } System.out.println(ch + " : " + chars[ch]) System.out.println System.out System System.out ch + " : " + chars[ch] ch + " : " + chars[ch] ch " : " chars[ch] chars ch String[] args args public class Main{
  public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    int[] chars = new int[256];
    while(scanner.hasNextLine()){
      String line = scanner.nextLine();
      for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      }
    }
    for(char ch = 'a'; ch <= 'z'; ch++){
      System.out.println(ch + " : " + chars[ch]);
    }
  }
} public class Main{
  public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    int[] chars = new int[256];
    while(scanner.hasNextLine()){
      String line = scanner.nextLine();
      for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      }
    }
    for(char ch = 'a'; ch <= 'z'; ch++){
      System.out.println(ch + " : " + chars[ch]);
    }
  }
} Main
import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    int[] chars = new int[256];
    while(scanner.hasNextLine()){
      String line = scanner.nextLine();
      for(int i = 0; i < line.length(); i++){
        char c = line.toLowerCase().charAt(i);
        for(char j = 'a'; j <= 'z'; j++){
          if(c == j) chars[j] += 1;
        }
      }
    }
    for(char ch = 'a'; ch <= 'z'; ch++){
      System.out.println(ch + " : " + chars[ch]);
    }
  }
}