#include<bits/stdc++.h> using namespace std; typedef long long ll; //#include<bits/extc++.h> //__gnu_pbds int main(){ ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0); int n,k,t;cin>>n>>k>>t; string s;cin>>s; if(k%2==0){ cout<<"-1\n"; return 0; } return 0; }