SINGLE_RANGE_OVERLAP
( SINGLE_RANGE_OVERLAP((_cand)->start, (_cand)->stop, \
SINGLE_RANGE_OVERLAP((_cand)->start2, (_cand)->stop2, \
SINGLE_RANGE_OVERLAP((_cand)->start, (_cand)->stop, \
SINGLE_RANGE_OVERLAP((_cand)->start2, (_cand)->stop2, \