def molecuulformule(formule):
    alphanumeric = ''.join(e for e in formule if e.isalpha())
    index = 0
    dict = {}
    while index < len(alphanumeric):
        naam = alphanumeric[index]
        index += 1
        while index < len(alphanumeric) and not alphanumeric[index].isupper():
            naam += alphanumeric[index]
            index += 1
        if not naam in dict:
            dict[naam] = 0
        dict[naam] += 1
    return dict

def isomeren(formule1, formule2):
    if molecuulformule(formule1) == molecuulformule(formule2):
        return True
    else:
        return False