If A.B.C is a three digit number of hundred, ten and one, and a ≤ B ≤ C, then the maximum value of | A-B | + | B-C | + | C-A |,

If A.B.C is a three digit number of hundred, ten and one, and a ≤ B ≤ C, then the maximum value of | A-B | + | B-C | + | C-A |,

a-b