#include <bits/stdc++.h>
#define rep1(i, l, r) for (int i = l; i <= int(r); ++i)
#define rep2(i, l, r) for (int i = l; i >= int(r); --i)
#define rer(i, l, r, a) rep1(i, l, r) read(a[i])
#define ptc putchar
#define il inline
#define eb emplace_back
#define ef emplace_front
#define mp make_pair
#define fst first
#define snd second
#define sqr(x) ((x) * (x))
#define ls(x) x << 1
#define rs(x) x << 1 | 1
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
// typedef __int128 bll;
// typedef unsigned __int128 ubll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int MAXN = 2e5 + 10, LOGN = log2(MAXN) + 1, inf = ~0U >> 2, INF = ~0U >> 1;
const int dx[] = {0, 0, 1, -1}, dy[] = {1, -1, 0, 0};
namespace stupid_lrc {
	template <typename T> il bool read(T &x) {
		x = 0; bool f = false; char ch;
 		while (!isdigit(ch = getchar())) {
			f ^= !(ch ^ '-');
			if (ch == EOF) return false;
		}
		while (isdigit(ch)) x = (x << 1) + (x << 3) + (ch & 15), ch = getchar();
		if (f) x = ~x + 1; return true;
	}
	il int read() {int x; read(x); return x;}

	template <typename T> il bool read(pair <T, T> &x) {return read(x.fst) && read(x.snd);}

	template <typename T> il void gmin(T &x, T y) {x = x < y ? x : y;}

 	template <typename T> il void gmax(T &x, T y) {x = x > y ? x : y;}

	template <typename T, typename ...L>
	il bool read(T &x, L &...y) {return read(x) && read(y...);}

	template <typename T> il T lowbit(const T &x) {return x & -x;}
}
using namespace stupid_lrc;
int n, q, cnt, dep[MAXN], a[MAXN], dfn[MAXN], edfn[MAXN], stp, id[MAXN];
int f[MAXN][20]; ll sum[MAXN]; char s[MAXN];
vector <pii> lnk[MAXN];

struct {
	#define STZ MAXN << 2
	int mii[STZ], maa[STZ];
	
	il void pushup(int x) {
		mii[x] = min(mii[ls(x)], mii[rs(x)]);
		maa[x] = max(maa[ls(x)], maa[rs(x)]);
	}
	
	il void build(int x, int l, int r, int t) {
		if (l == r) {
			if (t == id[l] && a[l]) maa[x] = mii[x] = dfn[l];
			else maa[x] = -1, mii[x] = inf;
			return;
		} int mid = l + r >> 1;
		build(ls(x), l, mid, t); build(rs(x), mid + 1, r, t);
		pushup(x);
	}
	
	il void upd(int x, int l, int r, int k, int t) {
		if (l == r) {
			if (t == id[l] && a[l]) maa[x] = mii[x] = dfn[l];
			else maa[x] = -1, mii[x] = inf;
			return;
		} int mid = l + r >> 1;
		k <= mid ? upd(ls(x), l, mid, k, t) : upd(rs(x), mid + 1, r, k, t);
		pushup(x);
	}
	
	il pii query(int x, int l, int r, int ql, int qr) {
		if (l > qr || r < ql) return mp(-1, inf);
		if (l >= ql && r <= qr) return mp(maa[x], mii[x]);
		int mid = l + r >> 1; auto p = query(ls(x), l, mid, ql, qr), q = query(rs(x), mid + 1, r, ql, qr);
		return {max(p.fst, q.fst), min(p.snd, q.snd)};
	}
} T[55];

il void dfs(int x, int p, int t) {
	dfn[x] = ++stp; id[x] = t; edfn[stp] = x;
	bool fg = 0; f[x][0] = p; dep[x] = dep[p] + 1;
	for (auto t : lnk[x]) if (t.fst ^ p) {
		sum[t.fst] = sum[x] + t.snd;
		if (fg) dfs(t.fst, x, ++cnt);
		else dfs(t.fst, x, cnt), fg = 1;
	}
}

il ll dis(int x, int y) {
	ll ans = sum[x] + sum[y];
	if (dep[x] < dep[y]) swap(x, y);
	rep2(i, 17, 0) if (dep[x] - dep[y] >= 1 << i) x = f[x][i];
	if (x == y) return ans - sum[x] * 2;
	rep2(i, 17, 0) if (f[x][i] ^ f[y][i]) x = f[x][i], y = f[y][i];
	return ans - sum[f[x][0]] * 2;
}

il void solve() {
	read(n, q); cnt = 0; scanf("%s", s + 1);
	rep1(i, 1, n) a[i] = s[i] & 15;
	int u, v, w;
	rep1(i, 2, n) read(u, v, w), lnk[u].eb(v, w), lnk[v].eb(u, w);
	dfs(1, 0, ++cnt);
	rep1(j, 1, 17) rep1(i, 1, n) f[i][j] = f[f[i][j - 1]][j - 1];
	rep1(i, 1, cnt) T[i].build(1, 1, n, i);
	assert(cnt <= 50);
	while (q--) {
		int op = read();
		if (op == 1) {
			int x = read(); a[x] ^= 1;
			T[id[x]].upd(1, 1, n, x, id[x]);
		} else {
			vector <int> dot; int l, r; read(l, r);
			rep1(i, 1, cnt) {
				int x, y; tie(x, y) = T[i].query(1, 1, n, l, r);
				if (x >= 1 && x <= n) dot.eb(edfn[x]);
				if (y >= 1 && y <= n && x != y) dot.eb(edfn[y]);
			} sort(begin(dot), end(dot), [&](const int &x, const int &y){return dfn[x] < dfn[y];});
			if (dot.empty()) {
				puts("-1");
				continue;
			} int q = dot.size(); ll ans = 0;
			rep1(i, 0, q - 1) ans += dis(dot[i], dot[(i + 1) % q]);
			printf("%lld\n", ans);
		}
	}
}

int main() {
	for (int T = 1; T--; ) solve();
	return 0;
}