const BIDI_STEP_4_EN = '/[\\x{0030}-\\x{0039}\\x{00B2}-\\x{00B3}\\x{00B9}\\x{06F0}-\\x{06F9}\\x{2070}\\x{2074}-\\x{2079}\\x{2080}-\\x{2089}\\x{2488}-\\x{249B}\\x{FF10}-\\x{FF19}\\x{102E1}-\\x{102FB}\\x{1D7CE}-\\x{1D7FF}\\x{1F100}-\\x{1F10A}\\x{1FBF0}-\\x{1FBF9}]/u';