Calculate the expression

Time Limit: 2000/1000 MS (Java/Others)

Memory Limit: 32768/32768 K (Java/Others)

Description

You may find it’s easy to calculate the expression such as:
a = 3
b = 4
c = 5
a + b + c = ?
Isn’t it?

Input

The first line contains an integer stands for the number of test cases.
Each test case start with an integer n stands for n expressions will follow for this case.
Then n – 1 expressions in the format: [variable name][space][=][space][integer] will follow.
You may suppose the variable name will only contain lowercase letters and the length will not exceed 20, and the integer will between -65536 and 65536.
The last line will contain the expression you need to work out.
In the format: [variable name| integer][space][+|-][space][variable name| integer] …= ?
You may suppose the variable name must have been defined in the n – 1 expression and the integer is also between -65536 and 65536.
You can get more information from the sample.

Output

For each case, output the result of the last expression.

Sample Input

3 4 aa = 1 bb = -1 aa = 2 aa + bb + 11 = ? 1 1 + 1 = ? 1 1 + -1 = ?

Sample Output

12 2 0

Hint

lcy

Source

HDU2010省赛集训队选拔赛(校内赛)

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