Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ACM-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

E. Upside Down

time limit per test

3 secondsmemory limit per test

512 megabytesinput

standard inputoutput

standard outputAs we all know, Eleven has special abilities. Thus, Hopper convinced her to close the gate to the Upside Down World with her mind. Upside down monsters like to move between the worlds, so they are going to attack Hopper and Eleven in order to make them stop. The monsters live in the vines. The vines form a tree with *n* vertices, numbered from 1 through *n*. There's a lowercase English letter written in each tunnel (edge).

Upside down is a magical world. There are *m* types of monsters in upside down, numbered from 1 through *m*. Each type of monster has a special word that gives them powers. The special word of type *i* is *s*_{i}. There are *q* monsters in upside down. Each one is at a junction (vertex) and is going to some other junction. If monster of type *k* goes from junction *i* to junction *j*, the power it gains is the number of times it sees its special world (*s*_{k}) consecutively in the tunnels. More formally:

If *f*(*i*, *j*) is the string we get when we concatenate the letters written in the tunnels on the shortest path from *i* to *j*, then the power the monster gains is the number of occurrences of *s*_{k} in *f*(*i*, *j*).

Hopper and Eleven want to get prepared, so for each monster, they want to know the power the monster gains after moving.

Input

The first line of input contains three integers, *n*, *m* and *q* (2 ≤ *n* ≤ 10^{5}, 1 ≤ *m*, *q* ≤ 10^{5}).

The next *n* - 1 lines contain the tunnels (edges). Each line contains two integers *v* and *u* (1 ≤ *v*, *u* ≤ *n*, *v* ≠ *u*) and a lowercase English letter *c*, meaning there's a tunnel connecting junctions *v* and *u* written *c* in it. It is guaranteed that the given graph is a tree.

The next *m* lines contain the special words. *i*-th line of them contains a single string *s*_{i} (1 ≤ |*s*_{i}| ≤ 10^{5}), consisting of lowercase English letters. It is guaranteed that |*s*_{1}| + |*s*_{2}| + ... + |*s*_{m}| ≤ 10^{5}).

The next *q* lines contain the monsters. Each line contains three integers *i*, *j* and *k* (1 ≤ *i*, *j* ≤ *n*, *i* ≠ *j*, 1 ≤ *k* ≤ *m*), meaning a monster of type *k* is going from junction number *i* to junction number *j*.

Output

Print *q* lines. *i*-th line should contain a single integer, the power the *i*-th monster gains after moving.

Examples

Input

6 4 5

1 6 b

2 3 a

1 2 b

5 3 b

4 5 b

a

b

bb

aa

1 2 1

6 2 3

1 6 2

4 5 4

1 6 2

Output

0

1

1

0

1

Input

10 6 7

1 3 s

10 1 d

2 6 s

5 2 d

7 4 l

8 9 d

8 10 l

7 2 d

8 7 l

dl

dssld

d

d

l

sl

4 5 4

3 7 5

10 6 2

3 1 4

7 5 6

10 9 4

9 8 4

Output

2

2

0

0

0

1

1

Codeforces (c) Copyright 2010-2018 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: May/28/2018 02:25:28 (d1).

Desktop version, switch to mobile version.

User lists

Name |
---|