The `ᵗ` infix operator according to the documentation should return the last R elements from L, but it seems to be returning the elements from L starting from index R instead; knowing this you can set R to 1 to get all the elements except the first from L.
Prepending or appending things can be done with `‖` https://tio.run/##K8/ILC5ILSo2@v/fTiHaUMdIx1jHJJbLTsGQyw5IPNw63QjIMQVxjB81TDMBMfxLSwpKSxRM//8HAA
Prepending or appending things can be done with `‖` https://tio.run/##K8/ILC5ILSo2@v/fTiHaUMdIx1jHJJbLTsGQyw5IPNw63QjIMQVxjB81TDMBMfxLSwpKSxRM//8HAA