# Practice on Toph

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## Unbelievable Array

Limits: 1s, 512 MB

You will be given an array A of n integers and q operations. There are two types of operations:

• 1 x y, for this operation, you should replace all the occurrences of element x in the array with y
• 2 idx, output the value A[idx]

#### Input

Input starts with an integer T, denoting the number of test cases. The first line of each case contains two integers n and q. The next line contains n space separated integers A1, A2, A3, … , An forming the initial array.

Each of next q lines contains operations described above.

1 ≤ T ≤ 10
1 ≤ n, q ≤ 100000
1 ≤ Ai, x, y ≤ 100000
1 ≤ idx ≤ n

#### Output

For each test case, print “Case t:” (without quotes. t is the test case number) in the first line. Then for each 2nd type of operation, output the answer.

#### Samples

InputOutput
```1
5 4
1 2 3 4 5
1 1 3
2 1
1 3 5
2 1
```
```Case 1:
3
5
```

After the first update, A ={3, 2, 3, 4, 5}, A = 3
After the second update, A={5,2,5,4,5}, A = 5

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