import java.util.Scanner;
public class CharacterCounts {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("请输入一个字符串：");
        String str=sc.nextLine();
        int[] a=new int[26];
        for(int i=0;i<str.length();i++);
        {
            char c=str.charAT(i);
            int i=c-'a';
            a[i]=a[i]+1;}
            for(int j=0;j<a.length;j++){
            if(a[j]!=0)
                    System.out.println("字母"+(char)(j+'a')+"出现次数："+a[j]);}
          }

        
    }