```#include [HTML_REMOVED]
using namespace std;
const int N = 100010;
int n, qq;
int q[N];
int main() {
scanf("%d%d", &n, &qq);
for(int i = 0; i < n; i ++ ) scanf("%d", &q[i]);
int x;
while( qq -- ) {
scanf("%d", &x);
int l = 0, r = n - 1;
while(l < r) {
int mid = (l + r) >> 1;
if(q[mid] >= x) r = mid;
else l = mid + 1;
}
if(q[l] != x) puts("-1 -1");
else {
printf("%d ", l);
int l = 0, r = n - 1;
while(l < r) {
int mid = (l + r + 1) >> 1;
if(q[mid] <= x) l = mid;
else r = mid - 1;
}
printf("%d", l);
puts("");
}
}
return 0;
}