import java.util.*;

public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		String str = "";
		int[] cnt = new int[26];
		
		while(sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		}
		//System.out.println();
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		String str = "";
		int[] cnt = new int[26];
		
		while(sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		}
		//System.out.println();
	}
} Main public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		String str = "";
		int[] cnt = new int[26];
		
		while(sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		}
		//System.out.println();
	} main {
		
		Scanner sc = new Scanner(System.in);
		
		String str = "";
		int[] cnt = new int[26];
		
		while(sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		}
		//System.out.println();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String str = ""; str "" int[] cnt = new int[26]; cnt new int[26] 26 while(sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			}
		} sc.hasNext() sc.hasNext sc {
			str = sc.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			}
		} str = sc.nextLine() str sc.nextLine() sc.nextLine sc str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str char[] c = str.toCharArray(); c str.toCharArray() str.toCharArray str for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			} int i = 0; int i = 0; i 0 i < c.length i c.length c c.length i++ i++ i {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			} {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			} if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				} 'a' <= c[i] && c[i] <= 'z' 'a' <= c[i] 'a' c[i] c i c[i] <= 'z' c[i] c i 'z' {
					cnt[c[i] - 'a']++;
				} cnt[c[i] - 'a']++ cnt[c[i] - 'a'] cnt c[i] - 'a' c[i] c i 'a' for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		} int i = 0; int i = 0; i 0 i < 26 i 26 i++ i++ i {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		} {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		} System.out.println(((char)(i + 'a')) + " : " + cnt[i]) System.out.println System.out System System.out ((char)(i + 'a')) + " : " + cnt[i] ((char)(i + 'a')) + " : " + cnt[i] ((char)(i + 'a')) i 'a' " : " cnt[i] cnt i String[] args args public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		String str = "";
		int[] cnt = new int[26];
		
		while(sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		}
		//System.out.println();
	}
} public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		String str = "";
		int[] cnt = new int[26];
		
		while(sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		}
		//System.out.println();
	}
} Main
import java.util.*;

public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		String str = "";
		int[] cnt = new int[26];
		
		while(sc.hasNext()) {
			str = sc.nextLine();
			str = str.toLowerCase();
			char[] c = str.toCharArray();
			for(int i = 0; i < c.length; i++) {
				if('a' <= c[i] && c[i] <= 'z') {
					cnt[c[i] - 'a']++;
				}
			}
		}
		for(int i = 0; i < 26; i++) {
			System.out.println(((char)(i + 'a')) + " : " + cnt[i]);
		}
		//System.out.println();
	}
}