You are an expert competitive programmer. You will be given a problem statement, test case constraints and example test inputs and outputs. Please reason step by step about the solution (that must respect memory and time limits), then provide a complete implementation in python3.

Your solution must read input from standard input (cin), write output to standard output (cout).
Do not include any debug prints or additional output.

Put your final solution within a single code block:
```python
<your code here>
```

Execution time limit: 1.0 seconds
Memory limit: 256.0 MB

# Problem
After a long party Petya decided to return home, but he turned out to be at the opposite end of the town from his home. There are $$$n$$$ crossroads in the line in the town, and there is either the bus or the tram station at each crossroad.

The crossroads are represented as a string $$$s$$$ of length $$$n$$$, where $$$s_i = \texttt{A}$$$, if there is a bus station at $$$i$$$-th crossroad, and $$$s_i = \texttt{B}$$$, if there is a tram station at $$$i$$$-th crossroad. Currently Petya is at the first crossroad (which corresponds to $$$s_1$$$) and his goal is to get to the last crossroad (which corresponds to $$$s_n$$$).

If for two crossroads $$$i$$$ and $$$j$$$ for all crossroads $$$i, i+1, \ldots, j-1$$$ there is a bus station, one can pay $$$a$$$ roubles for the bus ticket, and go from $$$i$$$-th crossroad to the $$$j$$$-th crossroad by the bus (it is not necessary to have a bus station at the $$$j$$$-th crossroad). Formally, paying $$$a$$$ roubles Petya can go from $$$i$$$ to $$$j$$$ if $$$s_t = \texttt{A}$$$ for all $$$i \le t < j$$$.

If for two crossroads $$$i$$$ and $$$j$$$ for all crossroads $$$i, i+1, \ldots, j-1$$$ there is a tram station, one can pay $$$b$$$ roubles for the tram ticket, and go from $$$i$$$-th crossroad to the $$$j$$$-th crossroad by the tram (it is not necessary to have a tram station at the $$$j$$$-th crossroad). Formally, paying $$$b$$$ roubles Petya can go from $$$i$$$ to $$$j$$$ if $$$s_t = \texttt{B}$$$ for all $$$i \le t < j$$$.

For example, if $$$s$$$="AABBBAB", $$$a=4$$$ and $$$b=3$$$ then Petya needs:

- buy one bus ticket to get from $$$1$$$ to $$$3$$$,
- buy one tram ticket to get from $$$3$$$ to $$$6$$$,
- buy one bus ticket to get from $$$6$$$ to $$$7$$$.

Thus, in total he needs to spend $$$4+3+4=11$$$ roubles. Please note that the type of the stop at the last crossroad (i.e. the character $$$s_n$$$) does not affect the final expense.

Now Petya is at the first crossroad, and he wants to get to the $$$n$$$-th crossroad. After the party he has left with $$$p$$$ roubles. He's decided to go to some station on foot, and then go to home using only public transport.

Help him to choose the closest crossroad $$$i$$$ to go on foot the first, so he has enough money to get from the $$$i$$$-th crossroad to the $$$n$$$-th, using only tram and bus tickets.

## Input Format
Each test contains one or more test cases. The first line contains the number of test cases $$$t$$$ ($$$1 \le t \le 10^4$$$).

The first line of each test case consists of three integers $$$a, b, p$$$ ($$$1 \le a, b, p \le 10^5$$$) — the cost of bus ticket, the cost of tram ticket and the amount of money Petya has.

The second line of each test case consists of one string $$$s$$$, where $$$s_i = \texttt{A}$$$, if there is a bus station at $$$i$$$-th crossroad, and $$$s_i = \texttt{B}$$$, if there is a tram station at $$$i$$$-th crossroad ($$$2 \le |s| \le 10^5$$$).

It is guaranteed, that the sum of the length of strings $$$s$$$ by all test cases in one test doesn't exceed $$$10^5$$$.

## Output Format
For each test case print one number — the minimal index $$$i$$$ of a crossroad Petya should go on foot. The rest of the path (i.e. from $$$i$$$ to $$$n$$$ he should use public transport).

## Examples
```input
5
2 2 1
BB
1 1 1
AB
3 2 8
AABBBBAABB
5 3 4
BBBBB
2 1 1
ABABAB
```
```output
2
1
3
1
6
```

Now solve the problem and return the code.