F2L:

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Case 40:

Optimal Algorithms (4 HTM):

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

RrU Algorithms (4 HTM):

U R U' R'
U2 R U2 R'

RFU Algorithms (4 HTM):

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