The Confused Mobile Keypad

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ByteLandSoft has launched a new mobile phone which has got a T9 keyboard. They have introduced a new feature which lets you type without pressing the same key multiple times. That is, if you want to enter a letter, you have to press the key it corresponds to just once. For example, if you want to enter ‘q’, you have to press 7 only once ('p', 'q', 'r' and 's' correspond to 7, remember?). With the

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solution.cppC++17

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