import java.util.Scanner;

public class Main {


		public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		
		int ans[] = new int[26];
		
		while(scan.hasNext()){
			//??\??????????????±?????????????????¢???????????????????????°????¨??????????
			String moji = scan.nextLine();
			
			moji = moji.toLowerCase();
		
			int moji_len = moji.length();
			
			//??\????????????????????????????????????????????????????????§
			for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			}
		}
		//???????????¨???
		for(int cnt_arp = 0; cnt_arp < 26; cnt_arp++){
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		}
		//????§????
		scan.close();
	}
} import java.util.Scanner; Scanner java.util public class Main {


		public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		
		int ans[] = new int[26];
		
		while(scan.hasNext()){
			//??\??????????????±?????????????????¢???????????????????????°????¨??????????
			String moji = scan.nextLine();
			
			moji = moji.toLowerCase();
		
			int moji_len = moji.length();
			
			//??\????????????????????????????????????????????????????????§
			for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			}
		}
		//???????????¨???
		for(int cnt_arp = 0; cnt_arp < 26; cnt_arp++){
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		}
		//????§????
		scan.close();
	}
} Main public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		
		int ans[] = new int[26];
		
		while(scan.hasNext()){
			//??\??????????????±?????????????????¢???????????????????????°????¨??????????
			String moji = scan.nextLine();
			
			moji = moji.toLowerCase();
		
			int moji_len = moji.length();
			
			//??\????????????????????????????????????????????????????????§
			for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			}
		}
		//???????????¨???
		for(int cnt_arp = 0; cnt_arp < 26; cnt_arp++){
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		}
		//????§????
		scan.close();
	} main {
		Scanner scan = new Scanner(System.in);
		
		int ans[] = new int[26];
		
		while(scan.hasNext()){
			//??\??????????????±?????????????????¢???????????????????????°????¨??????????
			String moji = scan.nextLine();
			
			moji = moji.toLowerCase();
		
			int moji_len = moji.length();
			
			//??\????????????????????????????????????????????????????????§
			for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			}
		}
		//???????????¨???
		for(int cnt_arp = 0; cnt_arp < 26; cnt_arp++){
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		}
		//????§????
		scan.close();
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int ans[] = new int[26]; ans new int[26] 26 while(scan.hasNext()){
			//??\??????????????±?????????????????¢???????????????????????°????¨??????????
			String moji = scan.nextLine();
			
			moji = moji.toLowerCase();
		
			int moji_len = moji.length();
			
			//??\????????????????????????????????????????????????????????§
			for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			}
		} scan.hasNext() scan.hasNext scan {
			//??\??????????????±?????????????????¢???????????????????????°????¨??????????
			String moji = scan.nextLine();
			
			moji = moji.toLowerCase();
		
			int moji_len = moji.length();
			
			//??\????????????????????????????????????????????????????????§
			for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			}
		} String moji = scan.nextLine(); moji scan.nextLine() scan.nextLine scan moji = moji.toLowerCase() moji moji.toLowerCase() moji.toLowerCase moji int moji_len = moji.length(); moji_len moji.length() moji.length moji for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			} int cnt_len = 0; int cnt_len = 0; cnt_len 0 cnt_len < moji_len cnt_len moji_len cnt_len++ cnt_len++ cnt_len {
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			} {
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			} char moji_one = moji.charAt(cnt_len); moji_one moji.charAt(cnt_len) moji.charAt moji cnt_len int num = moji_one - 'a'; num moji_one - 'a' moji_one 'a' if(num >= 0 && num <= 26)
					ans[num]++; num >= 0 && num <= 26 num >= 0 num 0 num <= 26 num 26 ans[num]++ ans[num] ans num for(int cnt_arp = 0; cnt_arp < 26; cnt_arp++){
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		} int cnt_arp = 0; int cnt_arp = 0; cnt_arp 0 cnt_arp < 26 cnt_arp 26 cnt_arp++ cnt_arp++ cnt_arp {
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		} {
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		} System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]) System.out.println System.out System System.out (char)(cnt_arp + 'a') + " : " + ans[cnt_arp] (char)(cnt_arp + 'a') + " : " + ans[cnt_arp] (char)(cnt_arp + 'a') cnt_arp 'a' " : " ans[cnt_arp] ans cnt_arp scan.close() scan.close scan String[] args args public class Main {


		public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		
		int ans[] = new int[26];
		
		while(scan.hasNext()){
			//??\??????????????±?????????????????¢???????????????????????°????¨??????????
			String moji = scan.nextLine();
			
			moji = moji.toLowerCase();
		
			int moji_len = moji.length();
			
			//??\????????????????????????????????????????????????????????§
			for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			}
		}
		//???????????¨???
		for(int cnt_arp = 0; cnt_arp < 26; cnt_arp++){
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		}
		//????§????
		scan.close();
	}
} public class Main {


		public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		
		int ans[] = new int[26];
		
		while(scan.hasNext()){
			//??\??????????????±?????????????????¢???????????????????????°????¨??????????
			String moji = scan.nextLine();
			
			moji = moji.toLowerCase();
		
			int moji_len = moji.length();
			
			//??\????????????????????????????????????????????????????????§
			for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			}
		}
		//???????????¨???
		for(int cnt_arp = 0; cnt_arp < 26; cnt_arp++){
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		}
		//????§????
		scan.close();
	}
} Main
import java.util.Scanner;

public class Main {


		public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		
		int ans[] = new int[26];
		
		while(scan.hasNext()){
			//??\??????????????±?????????????????¢???????????????????????°????¨??????????
			String moji = scan.nextLine();
			
			moji = moji.toLowerCase();
		
			int moji_len = moji.length();
			
			//??\????????????????????????????????????????????????????????§
			for(int cnt_len = 0; cnt_len < moji_len; cnt_len++){
			
				char moji_one = moji.charAt(cnt_len);
			
				//????????????????????????a~Z??????????????¨?????´????????????????????????
				int num = moji_one - 'a';  // ???????????????
				if(num >= 0 && num <= 26)
					ans[num]++; 
			}
		}
		//???????????¨???
		for(int cnt_arp = 0; cnt_arp < 26; cnt_arp++){
			
			System.out.println((char)(cnt_arp + 'a') + " : " + ans[cnt_arp]);
		}
		//????§????
		scan.close();
	}
}