#include<stdio.h>#include <string.h>int main(){?? ???? char str[50];??? int a,b,c,d,i;??? gets(str);??? for(i=0;i<strlen(str);i++){?? ??? ? ??????? if(str[i]>='a'&&str[i]<='z'||str[i]>='A'&&str[i]<='Z'){?????? ??? ?a++;?? ??? ?}?? ??? ?else if(str[i]==' '){?? ??? ??? ?b++;?? ??? ??? ??? ??? ?}?? ??? ?else if(str[i]>='0'&&str[i]<='9')?? ??? ?c++;?? ??? ?else?? ??? ?d++;?? ?}??? printf("%d %d %d %d",a,b,c,d);}