In Applesoft Basic a variable name is represented by a letter followed by additional letters and numbers (e.g. X, XY, X1, XYZ, ...), but only the first two of them are meaningful, the following ones are ignored.

Therefore, XY and XYZ in my list are referring to the same memory area XY and are, basically, the same variable.

The same happens in the original listing, where REVERSE and RE are referring to the same memory area RE, because the additional characters VERSE are not meaningful.