# Practice on Toph

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## Unbelievable Array

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

Input | Output |
---|---|

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[1] = 3

After the second update, A={5,2,5,4,5}, A[1] = 5

ThunderingHerd Earliest, 2018-05-24 15:39:40.24 +0000 UTC

kissu_parina Fastest, 157704.5s

solaimanope Lightest, 3.1 MB

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