EasyChallengePython.py

markBeginGroup = "([{"
markEndGroup = ")]}"

def decodeInput(inputString):
    output = ""
    for character in inputString:
        if character in markEndGroup:
            output += " " + (inputString[inputString.rindex(markBeginGroup[markEndGroup.index(character)]) + 1 : inputString.index(character)])
            inputString = inputString[ : inputString.rindex(markBeginGroup[markEndGroup.index(character)])] + inputString[inputString.index(character) + 1:]
    return " ".join(output.split())

print(decodeInput("[racket for {brackets (matching) is a} computers]"))