snake_case to camelCase

Convert a snake_case identifier to camelCase: remove each underscore and capitalise the letter that followed it.

Input: one token in snake_case (lowercase letters, digits and single underscores between parts; no leading or trailing underscore).

Output: one line — the camelCase form.

Example 1

Input

total_student_marks

Output

totalStudentMarks

1 <= length <= 60

Hint 1

Walk the characters. On '_', set a flag to upper-case the next letter.

Hint 2

Otherwise append the character (upper-cased if the flag is set), then clear the flag.

Hint 3

Use a StringBuilder for the result.

Scan left to right. An underscore is dropped and tells you the next character should be upper-cased; every other character is copied as-is. A name with no underscores comes out unchanged.

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Input (stdin)

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