import java.util.*;

public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int al[] = new int[26];
		for(int i=0;i<26;i++){
			al[i]=0;
		}
		while(sc.hasNext()){
			String line = sc.next();
		line=line.toLowerCase();
		char[] ar = line.toCharArray();
		for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		}
		}
		for(int i=0;i<26;i++){
			System.out.printf("%c : %d\n",i+97,al[i]);
		}
	}
} import java.util.*; util.* java public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int al[] = new int[26];
		for(int i=0;i<26;i++){
			al[i]=0;
		}
		while(sc.hasNext()){
			String line = sc.next();
		line=line.toLowerCase();
		char[] ar = line.toCharArray();
		for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		}
		}
		for(int i=0;i<26;i++){
			System.out.printf("%c : %d\n",i+97,al[i]);
		}
	}
} Main public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int al[] = new int[26];
		for(int i=0;i<26;i++){
			al[i]=0;
		}
		while(sc.hasNext()){
			String line = sc.next();
		line=line.toLowerCase();
		char[] ar = line.toCharArray();
		for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		}
		}
		for(int i=0;i<26;i++){
			System.out.printf("%c : %d\n",i+97,al[i]);
		}
	} main {
		Scanner sc=new Scanner(System.in);
		int al[] = new int[26];
		for(int i=0;i<26;i++){
			al[i]=0;
		}
		while(sc.hasNext()){
			String line = sc.next();
		line=line.toLowerCase();
		char[] ar = line.toCharArray();
		for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		}
		}
		for(int i=0;i<26;i++){
			System.out.printf("%c : %d\n",i+97,al[i]);
		}
	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int al[] = new int[26]; al new int[26] 26 for(int i=0;i<26;i++){
			al[i]=0;
		} int i=0; int i=0; i 0 i<26 i 26 i++ i++ i {
			al[i]=0;
		} {
			al[i]=0;
		} al[i]=0 al[i] al i 0 while(sc.hasNext()){
			String line = sc.next();
		line=line.toLowerCase();
		char[] ar = line.toCharArray();
		for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		}
		} sc.hasNext() sc.hasNext sc {
			String line = sc.next();
		line=line.toLowerCase();
		char[] ar = line.toCharArray();
		for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		}
		} String line = sc.next(); line sc.next() sc.next sc line=line.toLowerCase() line line.toLowerCase() line.toLowerCase line char[] ar = line.toCharArray(); ar line.toCharArray() line.toCharArray line for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		} char ch ar {
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		} {
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		} if(Character.isLowerCase(ch)){
				al[ch-97]++;
			} Character.isLowerCase(ch) Character.isLowerCase Character ch {
				al[ch-97]++;
			} al[ch-97]++ al[ch-97] al ch-97 ch 97 for(int i=0;i<26;i++){
			System.out.printf("%c : %d\n",i+97,al[i]);
		} int i=0; int i=0; i 0 i<26 i 26 i++ i++ i {
			System.out.printf("%c : %d\n",i+97,al[i]);
		} {
			System.out.printf("%c : %d\n",i+97,al[i]);
		} System.out.printf("%c : %d\n",i+97,al[i]) System.out.printf System.out System System.out "%c : %d\n" i+97 i 97 al[i] al i String[] args args public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int al[] = new int[26];
		for(int i=0;i<26;i++){
			al[i]=0;
		}
		while(sc.hasNext()){
			String line = sc.next();
		line=line.toLowerCase();
		char[] ar = line.toCharArray();
		for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		}
		}
		for(int i=0;i<26;i++){
			System.out.printf("%c : %d\n",i+97,al[i]);
		}
	}
} public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int al[] = new int[26];
		for(int i=0;i<26;i++){
			al[i]=0;
		}
		while(sc.hasNext()){
			String line = sc.next();
		line=line.toLowerCase();
		char[] ar = line.toCharArray();
		for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		}
		}
		for(int i=0;i<26;i++){
			System.out.printf("%c : %d\n",i+97,al[i]);
		}
	}
} Main
import java.util.*;

public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int al[] = new int[26];
		for(int i=0;i<26;i++){
			al[i]=0;
		}
		while(sc.hasNext()){
			String line = sc.next();
		line=line.toLowerCase();
		char[] ar = line.toCharArray();
		for(char ch: ar){
			if(Character.isLowerCase(ch)){
				al[ch-97]++;
			}
		}
		}
		for(int i=0;i<26;i++){
			System.out.printf("%c : %d\n",i+97,al[i]);
		}
	}
}