// 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;

    vector<ll> nxt(n);
    for (ll i = n - 1; i >= 0; i--){ 
        if (i == n - 1 || b[i] != b[i + 1]) nxt[i] = i + 1;
        else nxt[i] = nxt[i + 1];
    }

    ll pt = -1, last = -1;

    vector<array<ll, 3>> ops;

    for (ll i = 0; i < n; i++) {
        if (last == b[i]) {
            if (pt < i) {
                ll r = i;

                vector<pl> op;
                op.push_back({i - 1, nxt[i] - 1});

                ll lb = nxt[i];
                for (ll j = i; j <= r; j++) {
                    if (lb < n && a[j] == b[lb]) {
                        op.push_back({j, nxt[lb] - 1});
                        r = lb;
                        lb = nxt[lb];
                    }
                }

                ll p = op.back().s;

                ll ft = op.back().s + 1;
                while (op.size()) {
                    pl x = op.back();
                    op.pop_back();
                    ll l = x.f, r = x.s;

                    // cout << l << " " << r << '\n';

                    for (ll p = l; p < r;) {
                        ll pr = p + 1;
                        if (p + 1 >= ft) pr = r;

                        if (a[p] < a[pr]) ops.push_back({'m', p, pr});
                        else if (a[p] > a[pr]) ops.push_back({'M', p, pr});

                        a[pr] = a[p];

                        p = pr;
                    }

                    ft = l;
                }
                i = p;
                ++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[pt]) ops.push_back({'M', t - 1, pt});
            else if (a[t - 1] > a[pt]) ops.push_back({'m', t - 1, pt});
        }

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