If ``h1'' or ``h2'' is entered at #27.6, the aspiring pre-images will be automatically selected according to Hamming distance from the target state. ``h1`` selects the n states that differ by 1 bit from the target state. ``h2'' selects the larger set of states that differ by 2 bits from the target state (h2). The following reminder will appear at the start of the next prompt (#27.7),