PLL · Diagonal swap

PLL E

x'
R
U'
R'
D
R
U
R'
D'
R
U
R'
D
R
U'
R'
D'
x
How to recognise it
No side has headlights: every side shows opposite colours on its corners. Hold it so that, on the front, the left corner has the left edge's colour and the right corner the right edge's.
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