[Cexpert-003] You should remember some of ASCII!
Characters from '0' to '9' are equal to decimals from 48 to 57.
Characters from 'A' to 'Z' are equal to decimals from 65 to 90.
Characters from 'a' to 'z' are equal to decimals from 97 to 122.
| ASCII | Decimal | Hex |
| '0' | 48 | 0x30 |
| '9' | 57 | 0x39 |
| 'A' | 65 | 0x41 |
| 'Z' | 90 | 0x5A |
| 'a' | 97 | 0x61 |
| 'z' | 122 | 0x7A |
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Poechant
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