Abendsen assigned a mission to Juliana. In this mission, Juliana has a rooted tree with $n$ vertices. Vertex number $1$ is the root of this tree. Each vertex can be either black or white. At first, all vertices are white. Juliana is asked to process $q$ queries. Each query is one of three types:

1. If vertex $v$ is white, mark it as black; otherwise, perform this operation on all direct sons of $v$ instead.
2. Mark all vertices in the subtree of $v$ (including $v$) as white.
3. Find the color of the $i$-th vertex.

An example of operation "1 1" (corresponds to the first example test). The vertices $1$ and $2$ are already black, so the operation goes to their sons instead.

Can you help Juliana to process all these queries?

Input

The first line contains two integers $n$ and $q$ ($2\leq n\leq 10^5$, $1\leq q\leq 10^5$) — the number of vertices and the number of queries.

The second line contains $n-1$ integers $p_2, p_3, \ldots, p_n$ ($1\leq p_i<i$), where $p_i$ means that there is an edge between vertices $i$ and $p_i$.

Each of the next $q$ lines contains two integers $t_i$ and $v_i$ ($1\leq t_i\leq 3$, $1\leq v_i\leq n$) — the type of the $i$-th query and the vertex of the $i$-th query.

It is guaranteed that the given graph is a tree.

Output

For each query of type $3$, print "black" if the vertex is black; otherwise, print "white".

见题面 Input 部分

见题面 Output 部分

The first example is shown on the picture below.

The second example is shown on the picture below.