1-#1: The switch
  1-1-#2: Aang
  1-1-1-#3: Katara changes - slow or gradual
  1-1-1-1-#4: Which Season?
  1-1-1-1-3-#5: After the fall of Ba Sing Se
  1-1-1-1-3-1-#6: The Failure and Rescue of the Avatar.
  1-1-1-1-3-1-1-#7: Explanations, Shock, and Love
  1-1-1-1-3-1-1-1-#8: Realizations and Beginners Mistakes
  1-1-1-1-3-1-1-1-2-#9: The right Decision, I hope...
  1-1-1-1-3-1-1-1-2-2-#10: Katara's Anxiety
  1-1-2-#3: Sokka
  1-1-2-1-#4:  Gradual swap  
  1-1-2-3-#4: other
  1-1-3-#3: What kind of abilities?
  1-1-3-2-#4: All of them - gradual or immeidate swapping
  1-1-5-#3: more options
  1-1-5-2-#4: Haru
  1-1-5-3-#4: even more options
  1-2-#2: Sokka
  1-2-3-#3: Katara
  1-2-3-2-#4: Immediate
  1-2-5-#3: Sokka, The Firebending Princess
  1-2-5-1-#4: Sokka Takes Advantage of the Situation
  1-2-5-1-1-#5: More with Sokka in Azula's body
  1-2-5-1-1-1-#6: Sokka can switch between any of the girls
  1-2-5-1-1-1-2-#7: Tylee
  1-2-5-2-#4: Back At Camp
  1-2-5-2-1-#5: Sibling Rivalry
  1-3-#2: Katara
  1-3-2-#3: Toph
  1-3-2-1-#4: Blackout
  1-3-5-#3: Zuko
  1-3-5-1-#4: gradual
  1-4-#2: Toph Bei Fong
  1-4-1-#3: Aang
  1-4-1-2-#4:  Immediate swap
  1-4-1-2-2-#5: Sokka comes screaming
  1-4-1-2-2-1-#6: Toph believes her
  1-4-3-#3: Sokka
  1-5-#2: Other