import java.util.Scanner;
import java.lang.String;
public class Main
{
	public static void main(String args[])
	{
		Scanner input = new Scanner(System.in);
		int[] sum = new int[55];
		String s;
		int b;
		while (input.hasNext())
		{
			s = input.next();
			for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			}
		}
		for(int i = 0; i < 26; i++)
		{
			System.out.println((char)('a' + i) + " : " + sum[i]);
		}
	}
} import java.util.Scanner; Scanner java.util import java.lang.String; String java.lang public class Main
{
	public static void main(String args[])
	{
		Scanner input = new Scanner(System.in);
		int[] sum = new int[55];
		String s;
		int b;
		while (input.hasNext())
		{
			s = input.next();
			for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			}
		}
		for(int i = 0; i < 26; i++)
		{
			System.out.println((char)('a' + i) + " : " + sum[i]);
		}
	}
} Main public static void main(String args[])
	{
		Scanner input = new Scanner(System.in);
		int[] sum = new int[55];
		String s;
		int b;
		while (input.hasNext())
		{
			s = input.next();
			for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			}
		}
		for(int i = 0; i < 26; i++)
		{
			System.out.println((char)('a' + i) + " : " + sum[i]);
		}
	} main {
		Scanner input = new Scanner(System.in);
		int[] sum = new int[55];
		String s;
		int b;
		while (input.hasNext())
		{
			s = input.next();
			for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			}
		}
		for(int i = 0; i < 26; i++)
		{
			System.out.println((char)('a' + i) + " : " + sum[i]);
		}
	} Scanner input = new Scanner(System.in); input new Scanner(System.in) int[] sum = new int[55]; sum new int[55] 55 String s; s int b; b while (input.hasNext())
		{
			s = input.next();
			for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			}
		} input.hasNext() input.hasNext input {
			s = input.next();
			for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			}
		} s = input.next() s input.next() input.next input for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			} int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			} {
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			} if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				} s.charAt(i) >= 'A' && s.charAt(i) <= 'Z' s.charAt(i) >= 'A' s.charAt(i) s.charAt s i 'A' s.charAt(i) <= 'Z' s.charAt(i) s.charAt s i 'Z' {
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				} b = (int)(s.charAt(i)-'A') b (int)(s.charAt(i)-'A') s.charAt(i) s.charAt s i 'A' sum[b]++ sum[b] sum b if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				} s.charAt(i)>='a' && s.charAt(i)<='z' s.charAt(i)>='a' s.charAt(i) s.charAt s i 'a' s.charAt(i)<='z' s.charAt(i) s.charAt s i 'z' {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				} b = (int)(s.charAt(i)-'a') b (int)(s.charAt(i)-'a') s.charAt(i) s.charAt s i 'a' sum[b]++ sum[b] sum b for(int i = 0; i < 26; i++)
		{
			System.out.println((char)('a' + i) + " : " + sum[i]);
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			System.out.println((char)('a' + i) + " : " + sum[i]);
		} {
			System.out.println((char)('a' + i) + " : " + sum[i]);
		} System.out.println((char)('a' + i) + " : " + sum[i]) System.out.println System.out System System.out (char)('a' + i) + " : " + sum[i] (char)('a' + i) + " : " + sum[i] (char)('a' + i) 'a' i " : " sum[i] sum i String args[] args public class Main
{
	public static void main(String args[])
	{
		Scanner input = new Scanner(System.in);
		int[] sum = new int[55];
		String s;
		int b;
		while (input.hasNext())
		{
			s = input.next();
			for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			}
		}
		for(int i = 0; i < 26; i++)
		{
			System.out.println((char)('a' + i) + " : " + sum[i]);
		}
	}
} public class Main
{
	public static void main(String args[])
	{
		Scanner input = new Scanner(System.in);
		int[] sum = new int[55];
		String s;
		int b;
		while (input.hasNext())
		{
			s = input.next();
			for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			}
		}
		for(int i = 0; i < 26; i++)
		{
			System.out.println((char)('a' + i) + " : " + sum[i]);
		}
	}
} Main
import java.util.Scanner;
import java.lang.String;
public class Main
{
	public static void main(String args[])
	{
		Scanner input = new Scanner(System.in);
		int[] sum = new int[55];
		String s;
		int b;
		while (input.hasNext())
		{
			s = input.next();
			for(int i = 0; i < s.length(); i++)
			{
				if(s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')
				{
					b = (int)(s.charAt(i)-'A');
					sum[b]++;
				}
				else if(s.charAt(i)>='a' && s.charAt(i)<='z') {
					b = (int)(s.charAt(i)-'a');
					sum[b]++;
				}
			}
		}
		for(int i = 0; i < 26; i++)
		{
			System.out.println((char)('a' + i) + " : " + sum[i]);
		}
	}
}