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** FIXED ON 13/09 BY PAUL.
** Solution: "i" variable was declared inside "if" statment
* 24/09 9:00am (Tuesday),left arrow goes past the string and keep going left. String isn't modified when inputting keys/characters (reported by Pavlo):
** FIXED ON 24/09 BY PAVLO.
** better restricted the left-bound limit.
** added a line for modifying the string.