Rating changes for the last round are temporarily rolled back. They will be returned soon.
×

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

The problem statement has recently been changed. View the changes.

×
E. Misha and LCP on Tree

time limit per test

8 secondsmemory limit per test

512 megabytesinput

standard inputoutput

standard outputMisha has a tree with characters written on the vertices. He can choose two vertices *s* and *t* of this tree and write down characters of vertices lying on a path from *s* to *t*. We'll say that such string corresponds to pair (*s*, *t*).

Misha has *m* queries of type: you are given 4 vertices *a*, *b*, *c*, *d*; you need to find the largest common prefix of the strings that correspond to pairs (*a*, *b*) and (*c*, *d*). Your task is to help him.

Input

The first line contains integer *n* (1 ≤ *n* ≤ 300 000) — the number of vertices in the tree.

Next follows a line consisting of *n* small English letters. The *i*-th character of the string corresponds to the character written on the *i*-th vertex.

Next *n* - 1 lines contain information about edges. An edge is defined by a pair of integers *u*, *v* (1 ≤ *u*, *v* ≤ *n*, *u* ≠ *v*), separated by spaces.

The next line contains integer *m* (1 ≤ *m* ≤ 1 000 000) — the number of queries.

Next *m* lines contain information about queries. A query is defined by four integers *a*, *b*, *c*, *d* (1 ≤ *a*, *b*, *c*, *d* ≤ *n*), separated by spaces.

Output

For each query print the length of the largest common prefix on a separate line.

Examples

Input

6

bbbabb

2 1

3 2

4 3

5 2

6 5

6

2 5 3 1

1 5 2 3

5 6 5 6

6 3 4 1

6 2 3 4

2 2 4 5

Output

2

2

2

0

1

0

Codeforces (c) Copyright 2010-2021 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Apr/20/2021 15:53:30 (j3).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|