# Calculator

Time Limit: 1000 ms

Memory Limit: 65535 ms

## Description

A simple 8-digit electronic calculator contains the following buttons: “1234567890+-*/=” (no quotes). It can be divided into the following categories:
Digit: “1234567890”
You can input any number with digital buttons (ignore leading zero). Notice, the LED of calculator can only display 8 digits. So when the number of digits large than eight, only the first eight digits will be retained. And when the number of one result’s digits large than eight, error occurs.
Operator: “+-*/”
For simplicity, all operations are integer operations. Some continuous operators, the last one is valid. When an operator button is pressed, the calculation before that will be completed.

Equal-sign: “=”
If the second operand is missing, you can think it equal the first operand. More than one continuous equal-sign means repeat the operation. You can observe the following examples.

## Input

The first line is number of test cases. After that, each case consists of one line, containing a string means pressed button. The length of string is less than 100. There is no additional space.

## Output

First output the case number. Then output the displayed number in the same line. If there is any error occurs, just print “ERROR” please. Please follow the format of the sample output.

## Sample Input

6
11+/2+
11+*==
3==+5=
5=7=+8=
99999999+1-1=
1-99999999=

## Sample Output

Case 1: 5
Case 2: 1331
Case 3: 8
Case 4: 15
Case 5: ERROR
Case 6: -99999998

## Source

The 5th Guangting Cup Central China Invitatio