i1 : S = K3(5,2,2)
o1 = K3 surface with rank 2 lattice defined by the intersection matrix:  8 2 
 2 2 
 (1,0): K3 surface of genus 5 and degree 8 containing rational curve of degree 2
 (2,0): K3 surface of genus 17 and degree 32 containing rational curve of degree 4
 (2,1): K3 surface of genus 20 and degree 38 containing rational curve of degree 2 (cubic fourfold)
 (3,0): K3 surface of genus 37 and degree 72 containing rational curve of degree 6
 (3,1): K3 surface of genus 42 and degree 82 containing rational curve of degree 4 (GM fourfold)
o1 : Latticepolarized K3 surface
