1881 def R(seqn):  argument
1883     for i in seqn:
1888     def __init__(self, seqn):  argument
1889         self.seqn = seqn
1891         return self.seqn[i]
1895     def __init__(self, seqn):  argument
1896         self.seqn = seqn
1901         if self.i >= len(self.seqn): raise StopIteration
1902         v = self.seqn[self.i]
1908     def __init__(self, seqn):  argument
1909         self.seqn = seqn
1912         for val in self.seqn:
1917     def __init__(self, seqn):  argument
1918         self.seqn = seqn
1921         if self.i >= len(self.seqn): raise StopIteration
1922         v = self.seqn[self.i]
1928     def __init__(self, seqn):  argument
1929         self.seqn = seqn
1936     def __init__(self, seqn):  argument
1937         self.seqn = seqn
1946     def __init__(self, seqn):  argument
1953 def L(seqn):  argument
1955     return chain(map(lambda x:x, R(Ig(G(seqn)))))