Ab Perm
Adjacent corner swap: Two neighbouring corners swap (plus edges); comes up 1 in 18 solves.
Algorithms
x' R U' R D2 R' U R D2 R2reads as x' · ZagZig (−last) · D2 · Insert (inverse) · D2 R2x R2 D2 R U R' D2 R U' R x'reads as x R2 D2 · Extract · D2 · ZagZig (−last) · x'l' R' D2 R U R' D2 R U' Rreads as l' R' D2 · Extract · D2 · ZagZig (−last)