#include
int main()
{char c;
int letter,num,blank,others;
c=getchar();
while(c!=EOF){
if((c>='a'&&c<='z')||(c>='A'&&c<='Z')){
letter++;
}
else if(c>='0'&&c<='9'){
num++;
}
else if(c==' '){
blank++;
}
else{
others++;
}
c=getchar();
}
printf("%d%d%d%d",letter,num,blank,others);
}
你是想要回车结束吗?