i1 : S = K3(3,1,2)
o1 = K3 surface with rank 2 lattice defined by the intersection matrix:  4 1 
 1 2 
 (1,0): K3 surface of genus 3 and degree 4 containing rational curve of degree 1
 (2,0): K3 surface of genus 9 and degree 16 containing rational curve of degree 2
 (3,0): K3 surface of genus 19 and degree 36 containing rational curve of degree 3
 (3,1): K3 surface of genus 21 and degree 40 containing rational curve of degree 1
 (4,0): K3 surface of genus 33 and degree 64 containing rational curve of degree 4
 (4,1): K3 surface of genus 36 and degree 70 containing rational curve of degree 2
o1 : Latticepolarized K3 surface
