Rows 1,3,4

alist = list('CS1110')

= 3 ) ['c','I','S','1','1','0'] 1 pos alist.index('1', print(pos) alist.insert( 'I') print(alist) D.join(alist) print(a) alist[] = '2' print(alist) a = 'C.I.S.1.1.01 ['c','I','S','1','1','2']