title= . .

ch1=1,a , 4
ch2=2, 50
ch3=4, 1
ch4=5, 3
ch5=6,, 2
ch6=7, 4
ch7=8, 5
ch8=9, 6
ch9=10,a, 6
ch10=11, a,  
ch11=12,,  
ch12=13, 7
ch13=14, 8
ch14=15, 9
ch15=16,, 2
ch16=17,  
ch17=19,