#include <bits/stdc++.h>
#define PB push_back
using namespace std;
const int N = 20100;
vector<int> bck[N], to[N];
int n, m;
string s, t;
bool was[N];
void down(int v){
s[v] = '0';
for (int u : bck[v])
down(u);
}
bool noone(int v){
if (v >= m) return (s[v] - '0');
int res = 0;
for (int u : bck[v])
res |= noone(u);
return res;
}
void mark_all(int v){
if (v >= m) t[v] = '0';
for (int u : bck[v])
mark_all(u);
}
int main(){
ios_base::sync_with_stdio(0); cin.tie(0);
#ifdef _LOCAL
freopen("in.txt","r",stdin);
#endif // _LOCAL
cin >> n >> m >> s;
for (int i = 0; i < m; i++){
char t1, t2; int n1, n2;
cin >> t1 >> n1 >> t2 >> n2;
n1--; n2--;
int fi = n1, se = n2;
if (t1 == 'x') fi += m;
if (t2 == 'x') se += m;
bck[i].PB(fi);
bck[i].PB(se);
to[fi].PB(i);
to[se].PB(i);
}
for (int i = 0; i < n; i++)
s += "1";
for (int i = 0; i < m; i++)
if (s[i] == '0')
down(i);
for (int i = 0; i < m; i++){
if (s[i] != '?') continue;
if (!noone(i))
s[i] = '0';
else {
t = s;
mark_all(i);
bool bad = 0;
for (int i = 0; i < m; i++){
was[i] = 0;
for (int u : bck[i])
if (u < m)
was[i] |= was[u];
else was[i] |= (t[u] - '0');
if (s[i] == '1' && !was[i]){
bad = 1;
break;
}
}
if (bad)
s[i] = '1';
}
}
for (int i = 0; i < m; i++)
cout << s[i];
return 0;
}
