7 0.5865384615384616 0.4795673076923077 0.3269230769230769 0.3485576923076923
8 0.7079326923076923 0.484375 0.21153846153846154 0.37259615384615385
15 0.765625 0.4495192307692308 0.27163461538461536 0.125