Codeforces733A - Grasshopper And the String

#include<iostream>
#include<cstring>
#include<algorithm>
using namespace std;

bool pd(char c){
    return (c=='A')||(c=='E')||(c=='I')||(c=='O')||(c=='U') ||(c=='Y')||(!c);
}
int main(){

    char s[1000];
    scanf("%s",s);
    int re=0;
    int k=-1;
    for(int i=0;i<=strlen(s);i++){
        if(pd(s[i]))
            re = max(re,i-k),k=i;
    }
    cout<<re<<endl;

}