F2L:

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Case 21:

Optimal Algorithms (5 HTM):

F' L' U2 L F

RrU Algorithms (7 HTM):

r U' r' U2 r U r'

RFU Algorithms (7 HTM):

U2 F' U' F2 R' F' R
U2 R U R' F' U' F
F' U F U2 F' U' F