Kindergarten Counting Game

#include<stdio.h>
char str[500];

int Find(int t)
{
    int i;
    for (i=t;str[i];i++)
    {
        if((str[i]>='A' && str[i]<='Z') || (str[i]>='a' && str[i]<='z')) continue;
        return i;
    }
    return i;
}
int main()
{
    int i;    
    while(gets(str)!=NULL)
    {
        int ans=0;
        for (i=0;str[i];)
        {
            if((str[i]>='a' && str[i]<='z') || (str[i]>='A' && str[i]<='Z') )
            {
                int t=Find(i);
                ans++;
                i=t;
            }
            else i++;
        }
        
        printf("%d\n",ans);
    }
    return 0;
}