import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
            int[] counter = new int[128];
            while(stdIn.hasNext()) {
                String str = stdIn.nextLine().toLowerCase();
                for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                }
            }
            for(char ch = 'a'; ch <= 'z'; ch++) {
                System.out.println(ch + " : " + counter[ch]);
            }
        
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
            int[] counter = new int[128];
            while(stdIn.hasNext()) {
                String str = stdIn.nextLine().toLowerCase();
                for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                }
            }
            for(char ch = 'a'; ch <= 'z'; ch++) {
                System.out.println(ch + " : " + counter[ch]);
            }
        
    }
} Main public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
            int[] counter = new int[128];
            while(stdIn.hasNext()) {
                String str = stdIn.nextLine().toLowerCase();
                for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                }
            }
            for(char ch = 'a'; ch <= 'z'; ch++) {
                System.out.println(ch + " : " + counter[ch]);
            }
        
    } main {
        Scanner stdIn = new Scanner(System.in);
            int[] counter = new int[128];
            while(stdIn.hasNext()) {
                String str = stdIn.nextLine().toLowerCase();
                for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                }
            }
            for(char ch = 'a'; ch <= 'z'; ch++) {
                System.out.println(ch + " : " + counter[ch]);
            }
        
    } Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) int[] counter = new int[128]; counter new int[128] 128 while(stdIn.hasNext()) {
                String str = stdIn.nextLine().toLowerCase();
                for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                }
            } stdIn.hasNext() stdIn.hasNext stdIn {
                String str = stdIn.nextLine().toLowerCase();
                for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                }
            } String str = stdIn.nextLine().toLowerCase(); str stdIn.nextLine().toLowerCase() stdIn.nextLine().toLowerCase stdIn.nextLine() stdIn.nextLine stdIn for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                } int i = 0; int i = 0; i 0 i < str.length() i str.length() str.length str i++ i++ i {
                    counter[str.charAt(i)]++;
                } {
                    counter[str.charAt(i)]++;
                } counter[str.charAt(i)]++ counter[str.charAt(i)] counter str.charAt(i) str.charAt str i for(char ch = 'a'; ch <= 'z'; ch++) {
                System.out.println(ch + " : " + counter[ch]);
            } char ch = 'a'; char ch = 'a'; ch 'a' ch <= 'z' ch 'z' ch++ ch++ ch {
                System.out.println(ch + " : " + counter[ch]);
            } {
                System.out.println(ch + " : " + counter[ch]);
            } System.out.println(ch + " : " + counter[ch]) System.out.println System.out System System.out ch + " : " + counter[ch] ch + " : " + counter[ch] ch " : " counter[ch] counter ch String[] args args public class Main {
    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
            int[] counter = new int[128];
            while(stdIn.hasNext()) {
                String str = stdIn.nextLine().toLowerCase();
                for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                }
            }
            for(char ch = 'a'; ch <= 'z'; ch++) {
                System.out.println(ch + " : " + counter[ch]);
            }
        
    }
} public class Main {
    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
            int[] counter = new int[128];
            while(stdIn.hasNext()) {
                String str = stdIn.nextLine().toLowerCase();
                for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                }
            }
            for(char ch = 'a'; ch <= 'z'; ch++) {
                System.out.println(ch + " : " + counter[ch]);
            }
        
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
            int[] counter = new int[128];
            while(stdIn.hasNext()) {
                String str = stdIn.nextLine().toLowerCase();
                for(int i = 0; i < str.length(); i++) {
                    counter[str.charAt(i)]++;
                }
            }
            for(char ch = 'a'; ch <= 'z'; ch++) {
                System.out.println(ch + " : " + counter[ch]);
            }
        
    }
}
