#include<stdio.h>

int main()
{
    char ch;
    int word=0,em=0,nu=0,oth=0;
    printf("please input a sentence:%c",ch);
    scanf("%c",&ch);
    while((ch=getchar())!='\n')
    {
        if((ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z'))
        {
            word=word+1;
        }
        else if(em=' ')
        {
            em++;
        }
        else if(nu>='0'&&nu<='9')
        {
            nu++;
        }
        else
        {
            oth++;
        }

    }
    printf("word:%d,em:%d,nu:%d,oth:%d",word,em,nu,oth);

    return 0;
}