F2L:

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Case 20:

Optimal Algorithms (5 HTM):

R B U2 B' R'

RrU Algorithms (7 HTM):

R U' R' U2 R U R'
r U' R' U2 R U r'

RFU Algorithms (7 HTM):

U2 F' U' F R U R'
U2 R U R2 F R F'
R U' R' U2 R U R'