import java.util.*;
public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String line = scanner.nextLine(); Map<Character, Integer> map = new LinkedHashMap<Character, Integer>();
//write your code here......
for(int i = 0;i<line.length();i++){
int count = 0;
if((line.charAt(i) >= 'A' && line.charAt(i) <= 'Z') || ((line.charAt(i) >= 'a' && line.charAt(i) <= 'z'))){
for(int j = 0 ; j<line.length();j++){
if(line.charAt(i) == line.charAt(j)){
count++;
}
map.put(line.charAt(i),count);
}
}else{
continue;
}
}
Set<Map.Entry<Character, Integer>> entrys = map.entrySet();
for (Map.Entry<Character, Integer> entry : entrys) {
System.out.println(entry.getKey() + ":" + entry.getValue());
}
}
}