// comp = compile
// compr = compile & run
// in terminal, gocp goes to cp directory

#include <bits/stdc++.h>
using namespace std;

#include <bits/extc++.h>
using namespace __gnu_pbds;
using ll = long long;

using ordered_set = tree<ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update>;
using pl = pair<ll, ll>;
#define f first
#define s second

ll n;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin >> n;

    vector<ll> a(n), b(n);
    for (ll &x: a) cin >> x;
    for (ll &x: b) cin >> x;

    ll pt = -1, last = -1;

    vector<array<ll, 3>> ops;

    for (ll i = 0; i < n; i++) {
        if (last == b[i]) {
            if (pt < i) {
                assert(pt == i - 1);
                if (last <= a[i]) ops.push_back({'m', i - 1, i});
                else ops.push_back({'M', i - 1, i});
                ++pt;
            }
            continue;
        }

        if (pt < i) {
            assert(pt == i - 1);
            last = a[i];
            ++pt;
        }
        ll pr = pt;
        while (pt < n && a[pt] != b[i]) ++pt;

        if (pt == n) {
            cout << -1 << '\n';
            return 0;
        }

        for (ll t = pt; t - 1 > pr; t--) {
            if (a[t - 1] <= a[t]) ops.push_back({'M', t - 1, t});
            else ops.push_back({'m', t - 1, t});
        }

        if (last <= a[pt]) ops.push_back({'M', i, pt});
        else ops.push_back({'m', i, pt});

        last = a[pt];
    }

    assert(ops.size() <= 2 * n);

    cout << ops.size() << '\n';
    for (auto x: ops) {
        cout << ((char)x[0]) << " " << x[1] + 1 << " " << x[2] + 1 << '\n';
    }
}