else update as necessary ( point 1 )
else if ( a1 [ _one . first ] + a2 [ _one . second ] <= a2 [ _two . first ] + a1 [ _two . second ] ) { if ( a1 [ _one . first ] < a2 [ _one . second ] ) { System . out . print ( " [ " + a1 [ _one . first ] + " , ▁ " + a2 [ _one . second ] + " ] ▁ " ) ;