Problem Statement

How many such pairs of letters are there in the word CHORDAMESODERM which has as many letters between them (from both the sides) as in the alphabets from A to Z? (inferred — the photographed question is cut off at the right edge of the screen after "which has as many letters betwe"; the clause is restored from the identical wording used by two other items of this same assessment. The restoration is not load bearing: counting only pairs whose alphabetical step runs forward and counting pairs in both directions give the same total for this word.) A pair qualifies when the number of letters lying between the two letters inside the word equals the number of letters lying between those same two letters in the English alphabet. Letters repeat in this word, and each occurrence is treated as a separate letter, so a pair is a pair of positions . For reference, the letters of the word occupy these positions: Position 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Letter C H O R D A M E S O D E R M