#include<stdio.h>
main()
{int fun(int s);
 char c;
 int letter=0,space=0,digit=0,other=0,sum;
 printf("input:\n");
 while((c=getchar())!='\n')
  {
  if(c>='a'&&c<='z'||c>='A'&&c<='Z')
   letter+=1;
  else if(c==' ')
   space+=1;
  else if(c>='0'&&c<='9')
   digit+=1;
  else
   other+=1;
  }
printf("fun()=%d",fun());
}
int fun(int s)
{
 int L,P,D,O;
 s=L+P+D+O;
 ruturn(s)
}