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on a cellphone, pressing 6-2-4-4-2 will produce "magic"

most common 10 digit phones have letters as well as numbers on the keys.

1 - [none] 2 - ABC 3 - DEF 4 - GHI 5 - JKL 6 - MNO 7 - PQRS 8 - TUV 9 - WXYZ 0 - [operator]

It's called "alphanumeric code."

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