#include<iostream>
#include <stdio.h>
#include<string.h>
#include <fstream>
#define INF 1000000
using namespace std;
char S[INF];
int main() {

 ofstream myfile;
 fstream  afile;
 afile.open("substring.in", ios::out | ios::in );
 long long N,L,K,i,j,countn = 0;
 bool flag;
 afile >> S;
 cin.getline(S, INF);
 afile >> L;
 cin>>L;
 afile >> K;
 cin>>K;
 for(i = 0; i < strlen(s); i++) {
    for(j = i; j < L+i; j++) {
        if(s[j] != '1') {
            countn++;
        }
    }
    if(countn < K) {
        flag = false;
        break;
    }
    countn = 0;
 }
 myfile.open ("substring.out");
 if(flag) {
    myfile << "Yes\n";
 } else {
    myfile << "No\n";
 }
myfile.close();
afile.close();
return 0;
}