Score : $400$ points
You are given a string $S$ consisting of A, B, C.
Let $S^{(0)}:=S$. For $i=1,2,3,\ldots$, let $S^{(i)}$ be the result of simultaneously replacing the characters of $S^{(i-1)}$ as follows: A → BC, B → CA, C → AB.
Answer $Q$ queries. The $i$-th query is as follows.
A, B, C.Input is given from Standard Input in the following format:
$S$
$Q$
$t_1$ $k_1$
$t_2$ $k_2$
$\hspace{0.4cm}\vdots$
$t_Q$ $k_Q$
Process the $Q$ queries in ascending order of index, that is, in the given order. Each answer should be followed by a newline.
ABC 4 0 1 1 1 1 3 1 6
A B C B
We have $S^{(0)}=$ABC, $S^{(1)}=$BCCAAB.
Thus, the answers to the queries are A, B, C, B in the given order.
CBBAACCCCC 5 57530144230160008 659279164847814847 29622990657296329 861239705300265164 509705228051901259 994708708957785197 176678501072691541 655134104344481648 827291290937314275 407121144297426665
A A C A A