Crazy 3x3x3 plus Mercury cube tutorial part 3a: Solving the middle triangles

This is the first section of the 3rd part in the solve of the crazy 3x3x3 Mercury cube. Only one algorithm with 2 permutations: 3 cycle triangle shift: right permution (ULF to FRD): R Ui Ri F Ri Fi R (D or Di or 2D) Ri F R Fi R U Ri (Di or D or 2D) Left permutation (URF to FLD): Li U L Fi L F Li (D or Di or 2D) L Fi Li F Li Ui L (Di or D or 2D)