String Operations Processor

You are given an initial string A and a sequence of operations to perform on it. The operations are one of the following:

• Append(c): Append the character c to the end of the string.
• Remove(): Remove the last character of the string.
• Print(): Output the current string.

The operations are executed sequentially. When a Print() operation is encountered, the current string is printed on a new line.

Note: The string always starts with A. It is guaranteed that the operations will be valid so that the string never becomes undefined.

Mathematical Description:

If we denote the current string by \( S \) (initially \( S = A \)), then:

• For an operation \( Append(c) \): \( S \leftarrow S + c \).
• For an operation \( Remove() \): \( S \leftarrow S[0:|S|-1] \) (i.e. remove the last character).
• For an operation \( Print() \): Output the current \( S \).

inputFormat

The input is given from the standard input (stdin) with the following format:

N
operation_1
operation_2
...
operation_N

Where N (an integer) is the number of operations, and each subsequent line represents an operation. Each operation is a string in one of the formats Append(c), Remove(), or Print().

outputFormat

For each Print() operation, output the current string on a new line to the standard output (stdout). If no Print() operation is executed, output nothing.

## sample

7
Append(B)
Append(C)
Print()
Remove()
Print()
Append(D)
Print()

ABC
AB
ABD

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