import java.util.*;
public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
    	int i, j, k;
    	String moji = "";
    	int count[] = new int[26];
	    while(sc.hasNextLine()) {
	    	moji += sc.nextLine();
	    }
	    moji = moji.toLowerCase();
	   	for(i = 0; i < moji.length(); i++) {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	}
    	for(i = 0; i < 26; i++) {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	}
    }
} import java.util.*; util.* java public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
    	int i, j, k;
    	String moji = "";
    	int count[] = new int[26];
	    while(sc.hasNextLine()) {
	    	moji += sc.nextLine();
	    }
	    moji = moji.toLowerCase();
	   	for(i = 0; i < moji.length(); i++) {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	}
    	for(i = 0; i < 26; i++) {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	}
    }
} Main public static Scanner sc = new Scanner(System.in); sc new Scanner(System.in) public static void main(String[] args) throws Exception {
    	int i, j, k;
    	String moji = "";
    	int count[] = new int[26];
	    while(sc.hasNextLine()) {
	    	moji += sc.nextLine();
	    }
	    moji = moji.toLowerCase();
	   	for(i = 0; i < moji.length(); i++) {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	}
    	for(i = 0; i < 26; i++) {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	}
    } main {
    	int i, j, k;
    	String moji = "";
    	int count[] = new int[26];
	    while(sc.hasNextLine()) {
	    	moji += sc.nextLine();
	    }
	    moji = moji.toLowerCase();
	   	for(i = 0; i < moji.length(); i++) {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	}
    	for(i = 0; i < 26; i++) {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	}
    } int i i j j k; k String moji = ""; moji "" int count[] = new int[26]; count new int[26] 26 while(sc.hasNextLine()) {
	    	moji += sc.nextLine();
	    } sc.hasNextLine() sc.hasNextLine sc {
	    	moji += sc.nextLine();
	    } moji += sc.nextLine() moji sc.nextLine() sc.nextLine sc moji = moji.toLowerCase() moji moji.toLowerCase() moji.toLowerCase moji for(i = 0; i < moji.length(); i++) {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	} i = 0; i = 0 i 0 i < moji.length() i moji.length() moji.length moji i++ i++ i {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	} {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	} char c = moji.charAt(i); c moji.charAt(i) moji.charAt moji i if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		} 'a' <= c && 'z' >= c 'a' <= c 'a' c 'z' >= c 'z' c {
	   			count[c - 'a']++;
	   		} count[c - 'a']++ count[c - 'a'] count c - 'a' c 'a' for(i = 0; i < 26; i++) {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	} i = 0; i = 0 i 0 i < 26 i 26 i++ i++ i {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	} {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	} System.out.println((char)(i + 'a') + " : " + count[i]) System.out.println System.out System System.out (char)(i + 'a') + " : " + count[i] (char)(i + 'a') + " : " + count[i] (char)(i + 'a') i 'a' " : " count[i] count i String[] args args public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
    	int i, j, k;
    	String moji = "";
    	int count[] = new int[26];
	    while(sc.hasNextLine()) {
	    	moji += sc.nextLine();
	    }
	    moji = moji.toLowerCase();
	   	for(i = 0; i < moji.length(); i++) {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	}
    	for(i = 0; i < 26; i++) {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	}
    }
} public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
    	int i, j, k;
    	String moji = "";
    	int count[] = new int[26];
	    while(sc.hasNextLine()) {
	    	moji += sc.nextLine();
	    }
	    moji = moji.toLowerCase();
	   	for(i = 0; i < moji.length(); i++) {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	}
    	for(i = 0; i < 26; i++) {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	}
    }
} Main
import java.util.*;
public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
    	int i, j, k;
    	String moji = "";
    	int count[] = new int[26];
	    while(sc.hasNextLine()) {
	    	moji += sc.nextLine();
	    }
	    moji = moji.toLowerCase();
	   	for(i = 0; i < moji.length(); i++) {
	   		char c = moji.charAt(i);
	   		if('a' <= c && 'z' >= c) {
	   			count[c - 'a']++;
	   		}
	   	}
    	for(i = 0; i < 26; i++) {
    		System.out.println((char)(i + 'a') + " : " + count[i]);
    	}
    }
}
