#include <iostream>
using namespace std;

int WordIndex(char* str,int n){
int count=0,i=0;
for(;(count<n-1)&&str[i]!='\0';i++){
            if((str[i]==' ')&&(str[i+1]!=' ')){
                count++;
                cout<<str[i]<<endl;
                if(str[i]=='\0')
                break;
            }
        }
        if(str[i]=='\0') return -1;
        else
return i;
}

main(){
char input[256];
int n;
cin.getline(input,256);
cin>>n;
cout<<"i="<<WordIndex(input,n)<<endl;
system("pause");

}