Is there some method in Sage to decompose an involution in Weyl group as a product of $2$-cycles?
For example, I define
W=WeylGroup(['A', 3], prefix='s')
t1=[1,2,3,1,2,1]
t2=W.from_reduced_word(t1)
How to write t2 as a product of $2$-cycles? Thank you very much.