Interpret Variable Assignments

You are given a sequence of variable assignment statements. Each valid line contains an assignment in the format \(variable = value\). Your task is to process the input, ignore any empty lines, and for each assignment print the variable and its corresponding value in the format variable: value.

The input will be provided as multiple lines through standard input (stdin). For each valid (non-empty) line, you should:

• Ignore leading and trailing white spaces.
• Split the line using the '=' character.
• Trim the variable name and the value, and then output them in the format: variable: value

Please note that all formulae in the description follow \(\LaTeX\) format.

inputFormat

The input consists of several lines, where each line is either an assignment in the format variable = value or an empty line. Input is read from standard input (stdin).

outputFormat

For every non-empty assignment input, output a line in the format variable: value (without extra spaces) to standard output (stdout).

## sample

x = 5

x: 5

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