How can I change a string replacing every other comma with a ';'?
before
Geruno, Jeffrey, Fernandez, Jeff, Miller, Martin, Chalpan, Pamela, Stone, Jeff, Stephenson, John, Hoffman, Peter
expected
Geruno, Jeffrey; Fernandez, Jeff; Miller, Martin; Chalpan, Pamela; Stone, Jeff; Stephenson, John; Hoffman, Peter