what is the rule for this pattern (x, X, y, Y, x, X, y, Y...)?

Please describe a rule for the pattern x, X, y, Y, x, X, y, Y.....and give the next two terms in the pattern.
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1 Answer

Flip uppercase/lowercase, flip letter and upper case/lowercase, repeat forever.

It's just x, X, y, Y, x, X, y, Y, . . . forever
by Level 13 User (103k points)

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