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EG-1 21

(U) F' U2 R U2 R' U2 F

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Alternate Algs:

• (U') R U' R2 F2 R F' U R U R'
• (U) R U R’ U F’ R U R’ U’ R U R2 F2 R
• (U) R U R’ U F’ R U R’ U’ R’ F2 R2 U’ R’

Setup:

Recognition: