The transformation from kcaC to Cack involves reversing the order of the letters while preserving the case of each individual letter based on its original position. k(lower) c(lower) a(lower) C(upper) -> C(upper) a(lower) c(lower) k(lower). The letter originally at position 1 (k) moves to position 4 and keeps its lower case. The letter at position 2 (c) moves to position 3 and keeps its lower case. The letter at position 3 (a) moves to position 2 and keeps its lower case. The letter at position 4 (C) moves to position 1 and keeps its upper case.