left = pos > INDEL_WINDOW_SIZE? pos - INDEL_WINDOW_SIZE : 0;
right = pos + INDEL_WINDOW_SIZE;
if (types[0] < 0) right -= types[0];
left = pos > INDEL_WINDOW_SIZE? pos - INDEL_WINDOW_SIZE : 0;
right = pos + INDEL_WINDOW_SIZE;
if (types[0] < 0) right -= types[0];