def _ci_to_hgvs_coord(s, e):
def _ci_to_hgvs(c):<EOL><INDENT>return c + <NUM_LIT:1> if c >= <NUM_LIT:0> else c<EOL><DEDENT>return (None if s is None else _ci_to_hgvs(s), None if e is None else _ci_to_hgvs(e) - <NUM_LIT:1>)<EOL>
Convert continuous interbase (right-open) coordinates (..,-2,-1,0,1,..) to
    discontinuous HGVS coordinates (..,-2,-1,1,2,..)