▁were ▁formerly ▁used ▁to ▁write ▁Vietnam ese . ▁ ▁Ch arts ▁ 2 0 0 0 0 - 2 1 5 FF , ▁ 2 1 6 0 0 - 2 3 0 FF , ▁ 2 3 1 0 0 - 2 4 5 FF , ▁ 2 4 6 0 0 - 2 6 0 FF , ▁ 2 6 1 0 0 - 2 7 5 FF , ▁ 2 7 6 0 0 - 2 9 0 FF , ▁ 2 9 1 0 0 - 2 A 6 DF . ▁ ▁S ources ▁Note : ▁Many ▁characters ▁appear ▁in ▁more ▁than ▁one ▁source , ▁making ▁the ▁sum ▁of ▁individual ▁character ▁counts ▁( 7 4 , 0 3 7 ) ▁far ▁more ▁than ▁the ▁number ▁of ▁encoded ▁characters ▁( 4 2 , 7 1 8 ). ▁ ▁C J K ▁Un ified ▁Ide ograph s ▁Ext ension ▁C ▁ ▁The ▁block ▁named ▁C J K ▁Un ified ▁Ide ograph s ▁Ext ension ▁C ▁( 2 A 7 0 0 – 2 B 7 3 F ) ▁contains ▁ 4 , 1 4 9 ▁characters ▁in ▁the ▁range ▁U + 2 A 7 0 0 ▁through ▁U + 2 B 7 3 4 ▁that ▁were ▁added ▁in ▁Unicode ▁ 5 . 2 ▁( 2 0 0 9 ). ▁ ▁Ch arts ▁ 2 A 7 0 0 - 2 B 7 3 F . ▁ ▁S ources ▁Note : ▁Some ▁characters ▁appear ▁in ▁more ▁than ▁one ▁source , ▁making ▁the