[chriscuber123]

1. with and without limit (19)
F' D' F' L // EO + square
F D' B2 // 2x2x2 with inserted F
U F2 // pair
B' U' B F // F2L-1
B U' F U F' B' U2 // LL skip! cancels 1 with F2L-1 for a 19!
final solution: F' D' F' L F D' B2 U F2 B' U' B2 F U' F U F' B' U2 (19)

first sub 20 single! same solution as sébastien

at first i found the 19 by getting to L3C in 18 moves after F2L-1 then doing an insertion that canceled 7, but then i rewrote it this way and it looks better