What is the distance between I and E?
AAA-5-5-5BBB-4-4-4CCC-3-3-3DDD-2-2-2EEE-1-1-1FFF000GGG111HHH222III333JJJ444
We first mark the letter I on the number line and then proceed towards the letter E:
AAA-5-5-5BBB-4-4-4CCC-3-3-3DDD-2-2-2EEE-1-1-1FFF000GGG111HHH222III333JJJ444555KKK
Note that the distance between the two letters is 4 steps.
4