import java.util.Scanner;
import java.io.*;
public class Main{
	public static void main(String [] args){
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in),1200);
		String work = "";
		String input = "";
		
		try{
			input = r.readLine();
			while(input != null){
				work += input;
				input = r.readLine();
			}
		}catch(Exception e){
			System.out.println(e);
		}
		work = work.toLowerCase();
		int code;
		int count[] = new int[26];
		for(int i = 0; i < work.length(); i++){
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		}
		for(int i = 0; i < count.length; i++){
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		}
	}
} import java.util.Scanner; Scanner java.util import java.io.*; io.* java public class Main{
	public static void main(String [] args){
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in),1200);
		String work = "";
		String input = "";
		
		try{
			input = r.readLine();
			while(input != null){
				work += input;
				input = r.readLine();
			}
		}catch(Exception e){
			System.out.println(e);
		}
		work = work.toLowerCase();
		int code;
		int count[] = new int[26];
		for(int i = 0; i < work.length(); i++){
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		}
		for(int i = 0; i < count.length; i++){
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		}
	}
} Main public static void main(String [] args){
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in),1200);
		String work = "";
		String input = "";
		
		try{
			input = r.readLine();
			while(input != null){
				work += input;
				input = r.readLine();
			}
		}catch(Exception e){
			System.out.println(e);
		}
		work = work.toLowerCase();
		int code;
		int count[] = new int[26];
		for(int i = 0; i < work.length(); i++){
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		}
		for(int i = 0; i < count.length; i++){
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		}
	} main {
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in),1200);
		String work = "";
		String input = "";
		
		try{
			input = r.readLine();
			while(input != null){
				work += input;
				input = r.readLine();
			}
		}catch(Exception e){
			System.out.println(e);
		}
		work = work.toLowerCase();
		int code;
		int count[] = new int[26];
		for(int i = 0; i < work.length(); i++){
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		}
		for(int i = 0; i < count.length; i++){
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		}
	} BufferedReader r = new BufferedReader(new InputStreamReader(System.in),1200); r new BufferedReader(new InputStreamReader(System.in),1200) String work = ""; work "" String input = ""; input "" try{
			input = r.readLine();
			while(input != null){
				work += input;
				input = r.readLine();
			}
		}catch(Exception e){
			System.out.println(e);
		} catch(Exception e){
			System.out.println(e);
		} Exception e {
			System.out.println(e);
		} System.out.println(e) System.out.println System.out System System.out e {
			input = r.readLine();
			while(input != null){
				work += input;
				input = r.readLine();
			}
		} input = r.readLine() input r.readLine() r.readLine r while(input != null){
				work += input;
				input = r.readLine();
			} input != null input null {
				work += input;
				input = r.readLine();
			} work += input work input input = r.readLine() input r.readLine() r.readLine r work = work.toLowerCase() work work.toLowerCase() work.toLowerCase work int code; code int count[] = new int[26]; count new int[26] 26 for(int i = 0; i < work.length(); i++){
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		} int i = 0; int i = 0; i 0 i < work.length() i work.length() work.length work i++ i++ i {
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		} {
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		} code = ((int)work.charAt(i)) - 97 code ((int)work.charAt(i)) - 97 ((int)work.charAt(i)) work.charAt work i 97 if(!(0 <= code && code <= 25)){
				continue;
			} !(0 <= code && code <= 25) (0 <= code && code <= 25) 0 <= code 0 code code <= 25 code 25 {
				continue;
			} continue; count[code]++ count[code] count code for(int i = 0; i < count.length; i++){
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		} int i = 0; int i = 0; i 0 i < count.length i count.length count count.length i++ i++ i {
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		} {
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		} System.out.printf("%c : %d\n",i+97,count[i]) System.out.printf System.out System System.out "%c : %d\n" i+97 i 97 count[i] count i String [] args args public class Main{
	public static void main(String [] args){
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in),1200);
		String work = "";
		String input = "";
		
		try{
			input = r.readLine();
			while(input != null){
				work += input;
				input = r.readLine();
			}
		}catch(Exception e){
			System.out.println(e);
		}
		work = work.toLowerCase();
		int code;
		int count[] = new int[26];
		for(int i = 0; i < work.length(); i++){
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		}
		for(int i = 0; i < count.length; i++){
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		}
	}
} public class Main{
	public static void main(String [] args){
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in),1200);
		String work = "";
		String input = "";
		
		try{
			input = r.readLine();
			while(input != null){
				work += input;
				input = r.readLine();
			}
		}catch(Exception e){
			System.out.println(e);
		}
		work = work.toLowerCase();
		int code;
		int count[] = new int[26];
		for(int i = 0; i < work.length(); i++){
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		}
		for(int i = 0; i < count.length; i++){
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		}
	}
} Main
import java.util.Scanner;
import java.io.*;
public class Main{
	public static void main(String [] args){
		BufferedReader r = new BufferedReader(new InputStreamReader(System.in),1200);
		String work = "";
		String input = "";
		
		try{
			input = r.readLine();
			while(input != null){
				work += input;
				input = r.readLine();
			}
		}catch(Exception e){
			System.out.println(e);
		}
		work = work.toLowerCase();
		int code;
		int count[] = new int[26];
		for(int i = 0; i < work.length(); i++){
			code = ((int)work.charAt(i)) - 97;
			if(!(0 <= code && code <= 25)){
				continue;
			}
			count[code]++;
		}
		for(int i = 0; i < count.length; i++){
			
			System.out.printf("%c : %d\n",i+97,count[i]);
		}
	}
}