# wwwoooorrlddddd
def word (x):
    #w = "wwwoooorrlddddd"
    if len (x) == 1:
        return x
    if x[0] == x[1]:
        return word (x[1:])
    #else:
        #return word(x [1:])
    #return x
    return x[0] + word(x [1:])
print (word ("wwwooorrrld"))