Lemma
MediumPermutations & combinations
AQuA-RAT train #68224 · Combinatorics · Permutations & combinations

B @ K I 9 D © 5 2 T $ M…

B @ K I 9 D © 5 2 T $ M 4 E J # U R 1 A δ K 5 W 6 % F Q 7 H P 8 Z How many such numbers are there in the above arrangement each of which is immediately followed by a symbol but not immediately preceded by a consonant?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #68224

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