(72538) -> (27538) swap 7 and 2.
(27538) -> (25738) swap 7 and 5.
(25738) -> (25378) swap 7 and 3.
(25378) -> (25378) algorithm does not swap 7 and 8 because 7<8.
(25378) -> (25378) algorithm does not swap 2 and 5 because 2<5.
(25378) -> (23578) swap 3 and 5.
(23578) -> (23578) algorithm does not swap 5 and 7 because 5<7.
(23578) -> (23578) algorithm does not swap 7 and 8 because 7<8.