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Task/Odd-word-problem/Python/odd-word-problem-4.py

@@ -0,0 +1,33 @@
+from sys import stdin, stdout
+
+def fwd(c):
+    if c.isalpha():
+        return [stdout.write(c), (yield from fwd((yield f)))][1]
+    else:
+        return c
+
+def rev(c):
+    if c.isalpha():
+        return [(yield from rev((yield r))), stdout.write(c)][0]
+    else:
+        return c
+
+def fw():
+    while True:
+        stdout.write((yield from fwd((yield r))))
+
+def re():
+    while True:
+        stdout.write((yield from rev((yield f))))
+
+f = fw()
+r = re()
+next(f)
+next(r)
+
+coro = f
+while True:
+    c = stdin.read(1)
+    if not c:
+        break
+    coro = coro.send(c)