SMS Dictionary

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In the pre-smartphone era, most mobile phones with numeric keypads had a private dictionary of words to allow users to type messages quicker. On a typical phone of this type, each number key is assigned a subset of the alphabet {a,b,…,z}: 2 is assigned the subset {a,b,c}, 3 is assigned {d,e,f}, 4 is assigned {g,h,i}, 5 is assigned {j,k,l}, 6 is assigned {m,n,o}, 7 is assigned {p,q,r,s}, 8 is assig

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solution.cppC++17

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