// ITP1_8_C Counting Characters
import java.io.*;

class Main {

   public static void main(String[] args) {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      try {
         String str;
         int[] alphabet = new int[26];
         while ((str = br.readLine()) != null) {
            if (str.equals(""))
               break;
            str = str.toLowerCase();
            char[] ch = str.toCharArray();
            for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            }
         }

         for (int i = 0; i < alphabet.length; i++) {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         }
      }

      catch (Exception e) {
         System.err.println(e);
      }
   }
} import java.io.*; io.* java class Main {

   public static void main(String[] args) {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      try {
         String str;
         int[] alphabet = new int[26];
         while ((str = br.readLine()) != null) {
            if (str.equals(""))
               break;
            str = str.toLowerCase();
            char[] ch = str.toCharArray();
            for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            }
         }

         for (int i = 0; i < alphabet.length; i++) {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         }
      }

      catch (Exception e) {
         System.err.println(e);
      }
   }
} Main public static void main(String[] args) {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      try {
         String str;
         int[] alphabet = new int[26];
         while ((str = br.readLine()) != null) {
            if (str.equals(""))
               break;
            str = str.toLowerCase();
            char[] ch = str.toCharArray();
            for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            }
         }

         for (int i = 0; i < alphabet.length; i++) {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         }
      }

      catch (Exception e) {
         System.err.println(e);
      }
   } main {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      try {
         String str;
         int[] alphabet = new int[26];
         while ((str = br.readLine()) != null) {
            if (str.equals(""))
               break;
            str = str.toLowerCase();
            char[] ch = str.toCharArray();
            for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            }
         }

         for (int i = 0; i < alphabet.length; i++) {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         }
      }

      catch (Exception e) {
         System.err.println(e);
      }
   } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) try {
         String str;
         int[] alphabet = new int[26];
         while ((str = br.readLine()) != null) {
            if (str.equals(""))
               break;
            str = str.toLowerCase();
            char[] ch = str.toCharArray();
            for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            }
         }

         for (int i = 0; i < alphabet.length; i++) {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         }
      }

      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 {
         String str;
         int[] alphabet = new int[26];
         while ((str = br.readLine()) != null) {
            if (str.equals(""))
               break;
            str = str.toLowerCase();
            char[] ch = str.toCharArray();
            for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            }
         }

         for (int i = 0; i < alphabet.length; i++) {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         }
      } String str; str int[] alphabet = new int[26]; alphabet new int[26] 26 while ((str = br.readLine()) != null) {
            if (str.equals(""))
               break;
            str = str.toLowerCase();
            char[] ch = str.toCharArray();
            for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            }
         } (str = br.readLine()) != null (str = br.readLine()) str br.readLine() br.readLine br null {
            if (str.equals(""))
               break;
            str = str.toLowerCase();
            char[] ch = str.toCharArray();
            for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            }
         } if (str.equals(""))
               break; str.equals("") str.equals str "" break; str = str.toLowerCase() str str.toLowerCase() str.toLowerCase str char[] ch = str.toCharArray(); ch str.toCharArray() str.toCharArray str for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            } char c ch {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            } {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            } if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               } 'a' <= c && c <= 'z' 'a' <= c 'a' c c <= 'z' c 'z' {
                  alphabet[c - 'a']++;
               } alphabet[c - 'a']++ alphabet[c - 'a'] alphabet c - 'a' c 'a' for (int i = 0; i < alphabet.length; i++) {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         } int i = 0; int i = 0; i 0 i < alphabet.length i alphabet.length alphabet alphabet.length i++ i++ i {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         } {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         } System.out.println((char)('a' + i) + " : " + alphabet[i]) System.out.println System.out System System.out (char)('a' + i) + " : " + alphabet[i] (char)('a' + i) + " : " + alphabet[i] (char)('a' + i) 'a' i " : " alphabet[i] alphabet i String[] args args
// ITP1_8_C Counting Characters
import java.io.*;

class Main {

   public static void main(String[] args) {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      try {
         String str;
         int[] alphabet = new int[26];
         while ((str = br.readLine()) != null) {
            if (str.equals(""))
               break;
            str = str.toLowerCase();
            char[] ch = str.toCharArray();
            for (char c: ch) {
               if ('a' <= c && c <= 'z'){
                  alphabet[c - 'a']++;
               }
            }
         }

         for (int i = 0; i < alphabet.length; i++) {
            System.out.println((char)('a' + i) + " : " + alphabet[i]);
         }
      }

      catch (Exception e) {
         System.err.println(e);
      }
   }
}