#include <bits/stdc++.h>
using namespace std;
int main() {
    int n;
    cin >> n;
    while (n--) {
        string a, b;
        cin >> a >> b;
        if (a == b) {
            cout << "similar" << endl;
        } else if (a.size() == b.size()) {
            int cnt = 0;
            for (int i = 0; i < a.size(); i++)
                if (a[i] != b[i])
                    cnt++;
            if (cnt == 1)
                cout << "similar" << endl;
            else
                cout << "not similar" << endl;
        } else if (a.size() == b.size() + 1) {
            int cnt = 0;
            for (int i = 0, j = 0; i < a.size(); i++) {
                if (a[i] != b[j]) {
                    cnt++;
                } else {
                    j++;
                }
            }
            if (cnt == 1)
                cout << "similar" << endl;
            else
                cout << "not similar" << endl;
} else if (a.size() == b.size() - 1) {
        int cnt = 0;
        for (int i = 0, j = 0; i < b.size(); i++) {
            if (a[j] != b[i]) {
                cnt++;
            } else {
                j++;
            }
        }
        if (cnt == 1)
            cout << "similar" << endl;
        else
            cout << "not similar" << endl;
    } else
        cout << "not similar" << endl;
}
return 0;
}