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R
U'
R'
U2
R
U'
R'
U'
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Solutions:
U (R U R') U2 (R U R')
U' (R U2 R') U (R U R')
D' (L' U L) D *
y U (L' U L) U2 (L' U L)
All cases and solutions are based on
J Perm's best F2L sheet