Motu and Alphabets

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Motu loves playing with English alphabets. But unfortunately someone stole all alphabets from him. Now he is asking you to get him some alphabets to play with. You have been given a range $[L, R]$ (both inclusive). Since all numbers in this range would be in decimal number system (and you won't get any alphabets from them) you decided to convert all decimal numbers in this range to hexade

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solution.cppC++17

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