SR.N5
The SR . N5 was subsequently developed into a "stretched" variant , which was designated as the SR . N6; this model had a much expanded payload capacity and went on to be produced in greater numbers than the SR . N5 . 
<triplet> SR.N5 <subj> SR.N6 <obj> followed by <triplet> SR.N6 <subj> SR.N5 <obj> follows <subj> SR.N5 <obj> follows <triplet> SR.N5 <subj> SR.N6 <obj> followed by