SUBSTITUTION
AAAAEAAAARGAAATTTTFTTTTTTTTTTTTTTTTAAAAAAAAILVAAAAAAAA # 1. sequence
             TTTTFTTTATTTTTTDTTTTT                 # 2. sequence
DELETION
AAAAAAAAAAAAATTGTTTTTTTXXXXXTTTTTTTTTTMAAAAAAAAAAAAAAAA # 1. sequence
             TTGTTTTTTTTTTTTTTTTTM                 # 2. sequence

REVERSE
               TTTTTTTTTTTTTTTTTTTT  # 1. sequence
  AAAAAAAAAAAATTTTTTTTTTTTTTTTTTTTTAAAAAAAAAAAAAAAA # 2. sequence

PERFECT MATCHING ONLY AT BEGIN AND END OF 2. SEQUENCE
AAAAAAAAAAATTTTTTTTGGGGGGGGGGGGGGGGGGGGGTTTTTTTTTAAAAAAA # 1.sequence
           TTTTTTTTGGGNNGGGEEGGGEGGGGGGTTTTTTTTT    # 2. Sequence