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a.py

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+from __future__ import print_function
+import sys
+
+n, m = sys.stdin.readline().split()
+n, m = int(n), int(m)
+n, m = max(n, m), min(n, m)
+
+l = []
+l.append((n, m))
+while m != 0:
+  n, m = m, n % m
+  l.append((n, m))
+l.reverse()
+
+wins = [False]
+
+for i in range(len(l) - 1):
+  if not wins[i]:
+    wins.append(True)
+  elif l[i + 1][0] == l[i][0] + l[i][1]:
+    wins.append(False)
+  else:
+    wins.append(True)
+
+print("win" if wins[-1] else "lose")