// hairpin between E1 and E2
constraint I39.N I50.O        2.3 2.7 3.2
constraint I39.O I50.N        2.3 2.7 3.2

constraint L41.N I48.O        2.3 2.7 3.2
constraint L41.O I48.N        2.3 2.7 3.2

//hairpin between E4 and E5
constraint I125.N V130.O     2.3 2.7 3.2
constraint I125.O V130.N     2.3 2.7 3.2

constraint T123.N V132.O     2.3 2.7 3.2
constraint T123.O V132.N     2.3 2.7 3.2

// E3 and E4 in paralllel
constraint I96.N Q124.O      2.3 2.7 3.2
constraint I96.O Q126.N      2.3 2.7 3.2

constraint K94.N Q122.O      2.3 2.7 3.2
constraint K94.O Q124.N      2.3 2.7 3.2

constraint Y92.N K120.O      2.3 2.7 3.2
constraint Y92.O Q122.N      2.3 2.7 3.2