10 10 9SS*2=1S-9 *W+W+W+WW- S-1=S6S/5S =WSW*W*WW= 3W5+SS4=4S S=SW=WSWW3 =W/W1W1WW- 6W7*S=S4/6 *W-W-W-WWS S-S*1+S=12