import java.util.Scanner;

public class Main {
    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int [] count = new int[26];
        
        while(sc.hasNext()){
            String line  = sc.next();
            
            for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            }
        }
        
        for(int i = 0; i < count.length; i++){
            System.out.println((char)('a' + i) + " : " + count[i]);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int [] count = new int[26];
        
        while(sc.hasNext()){
            String line  = sc.next();
            
            for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            }
        }
        
        for(int i = 0; i < count.length; i++){
            System.out.println((char)('a' + i) + " : " + count[i]);
        }
    }
} Main public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int [] count = new int[26];
        
        while(sc.hasNext()){
            String line  = sc.next();
            
            for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            }
        }
        
        for(int i = 0; i < count.length; i++){
            System.out.println((char)('a' + i) + " : " + count[i]);
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int [] count = new int[26];
        
        while(sc.hasNext()){
            String line  = sc.next();
            
            for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            }
        }
        
        for(int i = 0; i < count.length; i++){
            System.out.println((char)('a' + i) + " : " + count[i]);
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int [] count = new int[26]; count new int[26] 26 while(sc.hasNext()){
            String line  = sc.next();
            
            for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            }
        } sc.hasNext() sc.hasNext sc {
            String line  = sc.next();
            
            for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            }
        } String line  = sc.next(); line sc.next() sc.next sc for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            } int i = 0; int i = 0; i 0 i < line.length() i line.length() line.length line i++ i++ i {
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            } {
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            } if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                } Character.isLowerCase(line.charAt(i)) Character.isLowerCase Character line.charAt(i) line.charAt line i {
                    ++count[line.charAt(i) - 'a'];
                } ++count[line.charAt(i) - 'a'] count[line.charAt(i) - 'a'] count line.charAt(i) - 'a' line.charAt(i) line.charAt line i 'a' if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                } Character.isUpperCase(line.charAt(i)) Character.isUpperCase Character line.charAt(i) line.charAt line i {
                    ++count[line.charAt(i) - 'A'];
                } ++count[line.charAt(i) - 'A'] count[line.charAt(i) - 'A'] count line.charAt(i) - 'A' line.charAt(i) line.charAt line i 'A' for(int i = 0; i < count.length; i++){
            System.out.println((char)('a' + i) + " : " + count[i]);
        } int i = 0; int i = 0; i 0 i < count.length i count.length count count.length i++ i++ i {
            System.out.println((char)('a' + i) + " : " + count[i]);
        } {
            System.out.println((char)('a' + i) + " : " + count[i]);
        } System.out.println((char)('a' + i) + " : " + count[i]) System.out.println System.out System System.out (char)('a' + i) + " : " + count[i] (char)('a' + i) + " : " + count[i] (char)('a' + i) 'a' i " : " count[i] count i String [] args args public class Main {
    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int [] count = new int[26];
        
        while(sc.hasNext()){
            String line  = sc.next();
            
            for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            }
        }
        
        for(int i = 0; i < count.length; i++){
            System.out.println((char)('a' + i) + " : " + count[i]);
        }
    }
} public class Main {
    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int [] count = new int[26];
        
        while(sc.hasNext()){
            String line  = sc.next();
            
            for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            }
        }
        
        for(int i = 0; i < count.length; i++){
            System.out.println((char)('a' + i) + " : " + count[i]);
        }
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int [] count = new int[26];
        
        while(sc.hasNext()){
            String line  = sc.next();
            
            for(int i = 0; i < line.length(); i++){
                if(Character.isLowerCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'a'];
                }
                
                else if(Character.isUpperCase(line.charAt(i))){
                    ++count[line.charAt(i) - 'A'];
                }
            }
        }
        
        for(int i = 0; i < count.length; i++){
            System.out.println((char)('a' + i) + " : " + count[i]);
        }
    }
}
