import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		char c;
		char cc;
		int sum[] = new int[26];
		try {
			while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			}
			cc='a';
			for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			}
		} catch (Exception e) {
			System.err.println(e);
		}
	}

} import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		char c;
		char cc;
		int sum[] = new int[26];
		try {
			while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			}
			cc='a';
			for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			}
		} catch (Exception e) {
			System.err.println(e);
		}
	}

} Main public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		char c;
		char cc;
		int sum[] = new int[26];
		try {
			while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			}
			cc='a';
			for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			}
		} catch (Exception e) {
			System.err.println(e);
		}
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		char c;
		char cc;
		int sum[] = new int[26];
		try {
			while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			}
			cc='a';
			for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			}
		} catch (Exception e) {
			System.err.println(e);
		}
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str; str char c; c char cc; cc int sum[] = new int[26]; sum new int[26] 26 try {
			while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			}
			cc='a';
			for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			}
		} catch (Exception e) {
			System.err.println(e);
		} catch (Exception e) {
			System.err.println(e);
		} Exception e {
			System.err.println(e);
		} System.err.println(e) System.err.println System.err System System.err e {
			while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			}
			cc='a';
			for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			}
		} while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			} (str=br.readLine()) !=null (str=br.readLine()) str br.readLine() br.readLine br null {
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			} for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				} int i=0; int i=0; i 0 i<str.length() i str.length() str.length str i++ i++ i {
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				} {
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				} c=str.toLowerCase().charAt(i) c str.toLowerCase().charAt(i) str.toLowerCase().charAt str.toLowerCase() str.toLowerCase str i cc='a' cc 'a' for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					} int j=0 ; int j=0 ; j 0 j<sum.length j sum.length sum sum.length j++ j++ j {
						if(c==cc){
							sum[j]++;
						}
						cc++;
					} {
						if(c==cc){
							sum[j]++;
						}
						cc++;
					} if(c==cc){
							sum[j]++;
						} c==cc c cc {
							sum[j]++;
						} sum[j]++ sum[j] sum j cc++ cc cc='a' cc 'a' for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			} int i = 0 ; int i = 0 ; i 0 i < sum.length i sum.length sum sum.length i++ i++ i {
				System.out.println(cc+" : "+sum[i]);
				cc++;
			} {
				System.out.println(cc+" : "+sum[i]);
				cc++;
			} System.out.println(cc+" : "+sum[i]) System.out.println System.out System System.out cc+" : "+sum[i] cc+" : "+sum[i] cc " : " sum[i] sum i cc++ cc String[] args args public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		char c;
		char cc;
		int sum[] = new int[26];
		try {
			while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			}
			cc='a';
			for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			}
		} catch (Exception e) {
			System.err.println(e);
		}
	}

} public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		char c;
		char cc;
		int sum[] = new int[26];
		try {
			while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			}
			cc='a';
			for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			}
		} catch (Exception e) {
			System.err.println(e);
		}
	}

} Main
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str;
		char c;
		char cc;
		int sum[] = new int[26];
		try {
			while((str=br.readLine()) !=null){
				for(int i=0;i<str.length();i++){
					c=str.toLowerCase().charAt(i);
					cc='a';
					for(int j=0 ; j<sum.length;j++){
						if(c==cc){
							sum[j]++;
						}
						cc++;
					}
				}
			}
			cc='a';
			for(int i = 0 ; i < sum.length;i++){
				System.out.println(cc+" : "+sum[i]);
				cc++;
			}
		} catch (Exception e) {
			System.err.println(e);
		}
	}

}