# translation of a Magma format presentation
inp 2
chor 1 2
chor 2 15
mu 1 2 3
chor 3 91
mu 3 2 4
chor 4 14
iv 1 5    # x^-1
cj 1 2 6  # y^-1 x y
mu 5 6 7
chor 7 2
cj 6 2 8  # y^-2 x y^2
mu 5 8 9
chor 9 3
cj 8 2 10  # y^-3 x y^3
mu 5 10 11
chor 11 4
cj 10 2 12  # y^-4 x y^4
mu 5 12 13
chor 13 3
pwr 3 2 14
mu 8 14 15
mu 15 4 16
cj 1 16 17
mu 5 17 18
chor 18 1
