Original: To distinguish numerals from letters they are followed by the keraia ( Greek , '' hornlike projection '' ) , a symbol ( Ê ) similar to an acute sign ( Â ) but with its own Unicode character ( U +0374 ) .
Simplified: To distinguish numerals from letters they are followed by the '' keraia '' ( Greek Î Î Ï Î Î Î â '' insect antenna ) , a symbol similar to an acute sign ( Unicode U +0374 ) .