Horshack: An integer is a counting number. If the sequence is 1,2; 2,3; 3,4; etc., the integer is apparent.
Kotter: It's apparent to who?
Horshack: So find the value of 'X'?
Kotter: 'X'? I don't know.
Horshack: Right! 'X' is unknown! So what's 'Y'?
Kotter: 'Y'?
Vinnie: Where?

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