stumbling ......... of stumbling 4348 -proskomma->
stumbling ......... of stumbling 4625 -skandalon->
stumblingblock ......... a stumblingblock 4348 -proskomma->
stumblingblock ......... a stumblingblock 4625 -skandalon->
stumblingblock ......... and a stumblingblock 4625 -skandalon->
stumblingstone ......... a stumblingstone 4348 -proskomma->
stumblingstone ......... at that stumblingstone 4348 -proskomma->
~~~~~~