import "strings"

func reverseInParentheses(inputString string) string {
    stack2d := make([][]rune, len(inputString))
    if inputString == "" {
        return ""
    }
    for i := range stack2d {
        stack2d[i] = make([]rune, len(inputString))
    }
    current := 0

    for index := 0; index < len(inputString); index++ {
        if(inputString[index] == '('){
            current += 1
        } else if( inputString[index] == ')') {
            stack2d = popStack(stack2d, current)
            current -= 1
        } else {
            stack2d[current] = append(stack2d[current], rune(inputString[index]))
        }
    }
    return strings.Trim(string(stack2d[0]), "\u0000")
}

func popStack(stack [][]rune , current int) [][]rune {
    var l rune
    for i:=0; i< len(stack[current]); i++ {
        l, stack[current] = stack[current][len(stack[current])-1], stack[current][:len(stack[current])-1]
        if l != '\u0000'{
        stack[current-1] = append(stack[current-1], l)
        }
    }
    return stack
}