2013-09-05 - Princeton Spring 2013 - reconstruction by Brest
D2 R2 F2 U2 F L2 U2 F R2 B2 R' U B2 F R F L' R' D2
x2 // inspection
D R D' U R2 D2 // cross
U2' R' U R U2' y R U R' // 1st pair
y U2' R U2' R' U2 R U' R' // 2nd pair
U' R' U R y U' R U' R' // 3rd pair
U' R' U2' R U' R' U R // 4th pair
U' r U R' U' r' R U R U' R' // ELL
