bool test(int diff) {
solver.init(n);
for(int i = 0; i < n; i++) for(int a = 0; a < 2; a++)
for(int j = i+1; j < n; j++) for(int b = 0; b < 2; b++)
if(abs(T[i][a] - T[j][b]) < diff) solver.add_clause(i, a^1, j, b^1);
return solver.solve();
}
bool gao(int diff){
int i, j;
f**k.init(n);
for(i = 0; i < n; i++){
for(int a = 0; a < 2; a++){
for(j = i + 1; j < n; j++){
for(int b = 0; b < 2; b++){
if(abs(T[i][a] - T[j][b]) < diff)
f**k.add_clause(i, a ^ 1, j, b ^ 1);
}
}
}
}
return f**k.solve();
}
bool check(const int &D1, const int &D2) {
ts.init(N);
for (int i = 0; i < N; ++i) {
for (int j = i + 1; j < N; ++j) {
if (x[i][j] > D2) {
ts.add_clause(i, 1, j, 1);
ts.add_clause(i, 0, j, 0);
} else
if (x[i][j] > D1) {
ts.add_clause(i, 0, j, 0);
}
}
}
return ts.solve();
}
int main() {
int n, m;
while (scanf("%d%d", &n, &m) != EOF) {
solver.init(n * 3);
int a, b, c;
for (int i = 0; i < n; i++) {
scanf("%d%d%d", &a, &b, &c);
solver.add_clause(a, 1, b, 1);
solver.add_clause(a, 1, c, 1);
}
for (int i = 0; i < m; i++) {
scanf("%d%d", &a, &b);
solver.add_clause(a, 0, b, 0);
}
if (solver.solve())
printf("yes\n");
else
printf("no\n");
}
return 0;
}
