import java.util.Scanner;

public class Main {
    public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        String str = "";

        while(sc.hasNext()) {
        	str += sc.nextLine();
        }
        str = str.toLowerCase();

        char[] alphabet = new char[] {'a','b','c','d','e','f','g','h','i','j','k',
        							  'l','m','n','o','p','q','r','s','t','u','v',
        							  'w','x','y','z'};

        int[] ans = new int[alphabet.length];

        for(int i = 0; i < str.length(); ++i) {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        }

        for(int i = 0; i < alphabet.length; i++) {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        }

    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        String str = "";

        while(sc.hasNext()) {
        	str += sc.nextLine();
        }
        str = str.toLowerCase();

        char[] alphabet = new char[] {'a','b','c','d','e','f','g','h','i','j','k',
        							  'l','m','n','o','p','q','r','s','t','u','v',
        							  'w','x','y','z'};

        int[] ans = new int[alphabet.length];

        for(int i = 0; i < str.length(); ++i) {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        }

        for(int i = 0; i < alphabet.length; i++) {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        }

    }
} Main public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        String str = "";

        while(sc.hasNext()) {
        	str += sc.nextLine();
        }
        str = str.toLowerCase();

        char[] alphabet = new char[] {'a','b','c','d','e','f','g','h','i','j','k',
        							  'l','m','n','o','p','q','r','s','t','u','v',
        							  'w','x','y','z'};

        int[] ans = new int[alphabet.length];

        for(int i = 0; i < str.length(); ++i) {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        }

        for(int i = 0; i < alphabet.length; i++) {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        }

    } main {
        Scanner sc = new Scanner(System.in);
        String str = "";

        while(sc.hasNext()) {
        	str += sc.nextLine();
        }
        str = str.toLowerCase();

        char[] alphabet = new char[] {'a','b','c','d','e','f','g','h','i','j','k',
        							  'l','m','n','o','p','q','r','s','t','u','v',
        							  'w','x','y','z'};

        int[] ans = new int[alphabet.length];

        for(int i = 0; i < str.length(); ++i) {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        }

        for(int i = 0; i < alphabet.length; i++) {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        }

    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String str = ""; str "" while(sc.hasNext()) {
        	str += sc.nextLine();
        } sc.hasNext() sc.hasNext sc {
        	str += sc.nextLine();
        } str += sc.nextLine() str sc.nextLine() sc.nextLine sc str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str char[] alphabet = new char[] {'a','b','c','d','e','f','g','h','i','j','k',
        							  'l','m','n','o','p','q','r','s','t','u','v',
        							  'w','x','y','z'}; alphabet new char[] {'a','b','c','d','e','f','g','h','i','j','k',
        							  'l','m','n','o','p','q','r','s','t','u','v',
        							  'w','x','y','z'} int[] ans = new int[alphabet.length]; ans new int[alphabet.length] alphabet.length alphabet alphabet.length for(int i = 0; i < str.length(); ++i) {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        } int i = 0; int i = 0; i 0 i < str.length() i str.length() str.length str ++i ++i i {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        } {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        } for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	} int j = 0; int j = 0; j 0 j < alphabet.length j alphabet.length alphabet alphabet.length j++ j++ j {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	} {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	} if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		} str.charAt(i) == alphabet[j] str.charAt(i) str.charAt str i alphabet[j] alphabet j {
        			ans[j]++;
        		} ans[j]++ ans[j] ans j for(int i = 0; i < alphabet.length; i++) {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        } int i = 0; int i = 0; i 0 i < alphabet.length i alphabet.length alphabet alphabet.length i++ i++ i {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        } {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        } System.out.println(String.format("%s : %d", alphabet[i], ans[i])) System.out.println System.out System System.out String.format("%s : %d", alphabet[i], ans[i]) String.format String "%s : %d" alphabet[i] alphabet i ans[i] ans i String... args args public class Main {
    public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        String str = "";

        while(sc.hasNext()) {
        	str += sc.nextLine();
        }
        str = str.toLowerCase();

        char[] alphabet = new char[] {'a','b','c','d','e','f','g','h','i','j','k',
        							  'l','m','n','o','p','q','r','s','t','u','v',
        							  'w','x','y','z'};

        int[] ans = new int[alphabet.length];

        for(int i = 0; i < str.length(); ++i) {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        }

        for(int i = 0; i < alphabet.length; i++) {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        }

    }
} public class Main {
    public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        String str = "";

        while(sc.hasNext()) {
        	str += sc.nextLine();
        }
        str = str.toLowerCase();

        char[] alphabet = new char[] {'a','b','c','d','e','f','g','h','i','j','k',
        							  'l','m','n','o','p','q','r','s','t','u','v',
        							  'w','x','y','z'};

        int[] ans = new int[alphabet.length];

        for(int i = 0; i < str.length(); ++i) {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        }

        for(int i = 0; i < alphabet.length; i++) {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        }

    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        String str = "";

        while(sc.hasNext()) {
        	str += sc.nextLine();
        }
        str = str.toLowerCase();

        char[] alphabet = new char[] {'a','b','c','d','e','f','g','h','i','j','k',
        							  'l','m','n','o','p','q','r','s','t','u','v',
        							  'w','x','y','z'};

        int[] ans = new int[alphabet.length];

        for(int i = 0; i < str.length(); ++i) {
        	for(int j = 0; j < alphabet.length; j++) {
        		if(str.charAt(i) == alphabet[j]) {
        			ans[j]++;
        		}
        	}
        }

        for(int i = 0; i < alphabet.length; i++) {
        	System.out.println(String.format("%s : %d", alphabet[i], ans[i]));
        }

    }
}
