next_indent = indent + LAST
syms = [MID] * (len(xs) - 1) + [END]
lines = [rec(x, next_indent, sym) for x, sym in zip(xs, syms)]
next_indent = indent + LAST
syms = [MID] * (len(xs) - 1) + [END]
lines = [rec(x, next_indent, sym) for x, sym in zip(xs, syms)]