public class Main {
	public static void main(String[] args){
		java.util.Scanner scan = new java.util.Scanner(System.in);
			scan.useDelimiter("//n");
			char[] arr = new char[1200];
			String str2 ="abcdefghijklmnopqrstuvwxyz";
			char[] arr2 = str2.toCharArray();
			int[] line = new int[26];

			do{
				String str = scan.nextLine();
				arr = str.toCharArray();

				for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				}
			}while(scan.hasNext());
		for(int i = 0;i < 26;i++){
			System.out.println(arr2[i] + " : " +line[i]);
		}
	}

} public class Main {
	public static void main(String[] args){
		java.util.Scanner scan = new java.util.Scanner(System.in);
			scan.useDelimiter("//n");
			char[] arr = new char[1200];
			String str2 ="abcdefghijklmnopqrstuvwxyz";
			char[] arr2 = str2.toCharArray();
			int[] line = new int[26];

			do{
				String str = scan.nextLine();
				arr = str.toCharArray();

				for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				}
			}while(scan.hasNext());
		for(int i = 0;i < 26;i++){
			System.out.println(arr2[i] + " : " +line[i]);
		}
	}

} Main public static void main(String[] args){
		java.util.Scanner scan = new java.util.Scanner(System.in);
			scan.useDelimiter("//n");
			char[] arr = new char[1200];
			String str2 ="abcdefghijklmnopqrstuvwxyz";
			char[] arr2 = str2.toCharArray();
			int[] line = new int[26];

			do{
				String str = scan.nextLine();
				arr = str.toCharArray();

				for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				}
			}while(scan.hasNext());
		for(int i = 0;i < 26;i++){
			System.out.println(arr2[i] + " : " +line[i]);
		}
	} main {
		java.util.Scanner scan = new java.util.Scanner(System.in);
			scan.useDelimiter("//n");
			char[] arr = new char[1200];
			String str2 ="abcdefghijklmnopqrstuvwxyz";
			char[] arr2 = str2.toCharArray();
			int[] line = new int[26];

			do{
				String str = scan.nextLine();
				arr = str.toCharArray();

				for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				}
			}while(scan.hasNext());
		for(int i = 0;i < 26;i++){
			System.out.println(arr2[i] + " : " +line[i]);
		}
	} java.util.Scanner scan = new java.util.Scanner(System.in); scan new java.util.Scanner(System.in) scan.useDelimiter("//n") scan.useDelimiter scan "//n" char[] arr = new char[1200]; arr new char[1200] 1200 String str2 ="abcdefghijklmnopqrstuvwxyz"; str2 "abcdefghijklmnopqrstuvwxyz" char[] arr2 = str2.toCharArray(); arr2 str2.toCharArray() str2.toCharArray str2 int[] line = new int[26]; line new int[26] 26 do{
				String str = scan.nextLine();
				arr = str.toCharArray();

				for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				}
			}while(scan.hasNext()); scan.hasNext() scan.hasNext scan {
				String str = scan.nextLine();
				arr = str.toCharArray();

				for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				}
			} String str = scan.nextLine(); str scan.nextLine() scan.nextLine scan arr = str.toCharArray() arr str.toCharArray() str.toCharArray str for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				} int i = 0; int i = 0; i 0 i <arr.length i arr.length arr arr.length i++ i++ i {
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				} {
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				} if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					} Character.isUpperCase(arr[i]) Character.isUpperCase Character arr[i] arr i {
						arr[i] = Character.toLowerCase(arr[i]);
					} arr[i] = Character.toLowerCase(arr[i]) arr[i] arr i Character.toLowerCase(arr[i]) Character.toLowerCase Character arr[i] arr i for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					} int j = 0; int j = 0; j 0 j< 26 j 26 j++ j++ j {
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					} {
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					} if(arr[i] == arr2[j]){
							line[j]++;
						} arr[i] == arr2[j] arr[i] arr i arr2[j] arr2 j {
							line[j]++;
						} line[j]++ line[j] line j for(int i = 0;i < 26;i++){
			System.out.println(arr2[i] + " : " +line[i]);
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			System.out.println(arr2[i] + " : " +line[i]);
		} {
			System.out.println(arr2[i] + " : " +line[i]);
		} System.out.println(arr2[i] + " : " +line[i]) System.out.println System.out System System.out arr2[i] + " : " +line[i] arr2[i] + " : " +line[i] arr2[i] arr2 i " : " line[i] line i String[] args args public class Main {
	public static void main(String[] args){
		java.util.Scanner scan = new java.util.Scanner(System.in);
			scan.useDelimiter("//n");
			char[] arr = new char[1200];
			String str2 ="abcdefghijklmnopqrstuvwxyz";
			char[] arr2 = str2.toCharArray();
			int[] line = new int[26];

			do{
				String str = scan.nextLine();
				arr = str.toCharArray();

				for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				}
			}while(scan.hasNext());
		for(int i = 0;i < 26;i++){
			System.out.println(arr2[i] + " : " +line[i]);
		}
	}

} public class Main {
	public static void main(String[] args){
		java.util.Scanner scan = new java.util.Scanner(System.in);
			scan.useDelimiter("//n");
			char[] arr = new char[1200];
			String str2 ="abcdefghijklmnopqrstuvwxyz";
			char[] arr2 = str2.toCharArray();
			int[] line = new int[26];

			do{
				String str = scan.nextLine();
				arr = str.toCharArray();

				for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				}
			}while(scan.hasNext());
		for(int i = 0;i < 26;i++){
			System.out.println(arr2[i] + " : " +line[i]);
		}
	}

} Main
public class Main {
	public static void main(String[] args){
		java.util.Scanner scan = new java.util.Scanner(System.in);
			scan.useDelimiter("//n");
			char[] arr = new char[1200];
			String str2 ="abcdefghijklmnopqrstuvwxyz";
			char[] arr2 = str2.toCharArray();
			int[] line = new int[26];

			do{
				String str = scan.nextLine();
				arr = str.toCharArray();

				for(int i = 0;i <arr.length;i++){
					if(Character.isUpperCase(arr[i])){
						arr[i] = Character.toLowerCase(arr[i]);
					}
					for(int j = 0; j< 26;j++){
						if(arr[i] == arr2[j]){
							line[j]++;
						}
					}
				}
			}while(scan.hasNext());
		for(int i = 0;i < 26;i++){
			System.out.println(arr2[i] + " : " +line[i]);
		}
	}

}