1594 def R(seqn):  argument
1596     for i in seqn:
1601     def __init__(self, seqn):  argument
1602         self.seqn = seqn
1604         return self.seqn[i]
1608     def __init__(self, seqn):  argument
1609         self.seqn = seqn
1614         if self.i >= len(self.seqn): raise StopIteration
1615         v = self.seqn[self.i]
1621     def __init__(self, seqn):  argument
1622         self.seqn = seqn
1625         for val in self.seqn:
1630     def __init__(self, seqn):  argument
1631         self.seqn = seqn
1634         if self.i >= len(self.seqn): raise StopIteration
1635         v = self.seqn[self.i]
1641     def __init__(self, seqn):  argument
1642         self.seqn = seqn
1649     def __init__(self, seqn):  argument
1650         self.seqn = seqn
1659     def __init__(self, seqn):  argument
1667 def L(seqn):  argument
1669     return chain(map(lambda x:x, R(Ig(G(seqn)))))