Ratio of time taken by a Ship to go 'S' km distance upstream to the time taken by that ship to go (S - 6) km downstream is 15 :8 respectively and also the ratio of speed of ship in still water to the speed of stream is 5 : 1 respectively. What is the respective ratio of time taken by that ship to go (S + 2) km upstream and (S + 12) km downstream?