 In most Asomtavruli letters , straight lines are horizontal or vertical and meet at right angles . The only letter with acute angles is <unk> ( ჯ jani ) . There have been various attempts to explain this exception . Georgian linguist and art historian Helen <unk> believes jani derives from a <unk> of Christ , composed of the <unk> ( ი ini ) and <unk> ( <unk> <unk> ) . According to Georgian scholar <unk> <unk> , the cross @-@ like shape of letter jani indicates the end of the alphabet , and has the same function as the similarly shaped Phoenician letter <unk> ( ) , Greek chi ( <unk> ) , and Latin X , though these letters do not have that function in Phoenician , Greek , or Latin . 
