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2. a : T 3. b : T 4. l1 : T List 5. l2 : T List 6. l : T List 7. [b / l2] = ([a / l1] @ l) ![]() ![]() | 1 step |
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2. a : T 3. b : T 4. l1 : T List 5. l2 : T List 6. l : T List 7. [b / l2] = ([a / l1] @ l) ![]() ![]() ![]() | 4 steps |
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2. a : T 3. b : T 4. l1 : T List 5. l2 : T List 6. a = b 7. l : T List 8. l2 = (l1 @ l) ![]() ![]() ![]() | 2 steps |
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