Move up row middle to middle row left
U→ L↑ U← L↓ U← F→ U→F←
Move up row middle to middle row right
U ← R↑ U→ R↓ U→ F← U← F→
Move from dot to ┘ to --- to cross
F→ U ← R↑ U→ R↓ F←
Swap top bottom row middle and top middle row left
R↑ U ← R↓ U ← R↑ U2 ← R↓ U ←
Pick a correct top left bottom corner
swap the other three with
U ← R↑ U→ L↑ U ← R↓ U→ L↓