Final Position on the Number Line

You are given a string consisting solely of the characters R and L. Starting at position 0 on the number line, each R moves you one unit to the right (i.e., adds 1), and each L moves you one unit to the left (i.e., subtracts 1). Formally, if you denote the final position as \(P\), then

\(P = \sum_{i=1}^{n} d_i\),

where \(d_i = 1\) if the i-th character is R and \(d_i = -1\) if it is L.

Your task is to read the input string from stdin, compute the final position after processing all characters, and output the result to stdout.

inputFormat

The input consists of a single line containing a non-empty string of characters. Each character in the string is either R or L.

outputFormat

Output a single integer representing the final position on the number line after applying all the moves described by the input string.

RRRR

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