class Stack:
    def __init__(self):
        self.items = []

    def isEmpty(self):
        return self.items == []

    def push(self, item):
        self.items.append(item)

    def pop(self):
        return self.items.pop()

    def peek(self):
        return self.items[len(self.items)-1]

    def size(self):
        return len(self.items)

def obr_polsk_zap(virajenie):
    prociduri = {}
    prociduri["*"] = 3
    prociduri["/"] = 3
    prociduri["+"] = 2
    prociduri["-"] = 2
    prociduri["("] = 1
    myStack = Stack()
    s1 = []
    virajenie_list = virajenie.split()

    for elem_viraj in virajenie_list:
        if elem_viraj in "1 2 3 4 5 6 7 8 9 10":
            s1.append(elem_viraj)
        elif elem_viraj == '(':
            myStack.push(elem_viraj)
        elif elem_viraj == ')':
            verh_elem_viraj = myStack.pop()
            while verh_elem_viraj != '(':
                s1.append(verh_elem_viraj)
                verh_elem_viraj = myStack.pop()
        else:
            while (not myStack.isEmpty()) and (prociduri[myStack.peek()] >= prociduri[elem_viraj]):
                  s1.append(myStack.pop())
            myStack.push(elem_viraj)

    while not myStack.isEmpty():
        s1.append(myStack.pop())
    return " ".join(s1)

print(obr_polsk_zap(" ( ( 5 + 2 * ( 8 + 4 * 2 ) ) * 7 ) "))