import java.util.Scanner;

public class Main{
    public static void main(String[]argc){
        Scanner sc = new Scanner(System.in);
        int[] count = new int[27];
        String s;
        while(sc.hasNext()){
            s = sc.next();
            s = s.toLowerCase();
            for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            }   
        }
        for(int j=0;j<26;j++){
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main{
    public static void main(String[]argc){
        Scanner sc = new Scanner(System.in);
        int[] count = new int[27];
        String s;
        while(sc.hasNext()){
            s = sc.next();
            s = s.toLowerCase();
            for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            }   
        }
        for(int j=0;j<26;j++){
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        }
    }
} Main public static void main(String[]argc){
        Scanner sc = new Scanner(System.in);
        int[] count = new int[27];
        String s;
        while(sc.hasNext()){
            s = sc.next();
            s = s.toLowerCase();
            for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            }   
        }
        for(int j=0;j<26;j++){
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int[] count = new int[27];
        String s;
        while(sc.hasNext()){
            s = sc.next();
            s = s.toLowerCase();
            for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            }   
        }
        for(int j=0;j<26;j++){
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] count = new int[27]; count new int[27] 27 String s; s while(sc.hasNext()){
            s = sc.next();
            s = s.toLowerCase();
            for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            }   
        } sc.hasNext() sc.hasNext sc {
            s = sc.next();
            s = s.toLowerCase();
            for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            }   
        } s = sc.next() s sc.next() sc.next sc s = s.toLowerCase() s s.toLowerCase() s.toLowerCase s for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            } int i=0; int i=0; i 0 i<s.length() i s.length() s.length s i++ i++ i {
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            } {
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            } int w = s.charAt(i); w s.charAt(i) s.charAt s i if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                } w-'a'>=0&&w-'a'<26 w-'a'>=0 w-'a' w 'a' 0 w-'a'<26 w-'a' w 'a' 26 {
                    count[w-'a']++;
                } count[w-'a']++ count[w-'a'] count w-'a' w 'a' for(int j=0;j<26;j++){
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        } int j=0; int j=0; j 0 j<26 j 26 j++ j++ j {
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        } {
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        } char c = (char)('a'+j); c (char)('a'+j) 'a' j System.out.println(c+" : "+count[j]) System.out.println System.out System System.out c+" : "+count[j] c+" : "+count[j] c " : " count[j] count j String[]argc argc public class Main{
    public static void main(String[]argc){
        Scanner sc = new Scanner(System.in);
        int[] count = new int[27];
        String s;
        while(sc.hasNext()){
            s = sc.next();
            s = s.toLowerCase();
            for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            }   
        }
        for(int j=0;j<26;j++){
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        }
    }
} public class Main{
    public static void main(String[]argc){
        Scanner sc = new Scanner(System.in);
        int[] count = new int[27];
        String s;
        while(sc.hasNext()){
            s = sc.next();
            s = s.toLowerCase();
            for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            }   
        }
        for(int j=0;j<26;j++){
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        }
    }
} Main
import java.util.Scanner;

public class Main{
    public static void main(String[]argc){
        Scanner sc = new Scanner(System.in);
        int[] count = new int[27];
        String s;
        while(sc.hasNext()){
            s = sc.next();
            s = s.toLowerCase();
            for(int i=0;i<s.length();i++){
                int w = s.charAt(i);
                if(w-'a'>=0&&w-'a'<26){
                    count[w-'a']++;
                }
            }   
        }
        for(int j=0;j<26;j++){
            char c = (char)('a'+j);
            System.out.println(c+" : "+count[j]);
        }
    }
}
