UVa 494 - Kindergarten Counting Game

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char data[5000],ch;

int main()
{
	while ( gets(data) ) {
		int is = 0,sum = 0;
		for ( int i = 0 ; data[i] ; ++ i ) {
			if ( data[i] >= 'a' && data[i] <= 'z' ||
				 data[i] >= 'A' && data[i] <= 'Z' )
				is = 1;
			else {
				sum += is;is = 0;
			}
		}
		printf("%d\n",sum+is);	
	}
	return 0;
}