In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.

['f', '1287', '4749', 'Z', 'N', 'P', '5427', '3573', '4883', '6355', 'B', '2901', 'A', 'p', 'a', 'c', '1327', 'V', 'F', '873', '5635', '7393']
6, 1287, 4749, 26, 14, 16, 5427, 3573, 4883, 6355, 2, 2901, 1, 16, 1, 3, 1327, 22, 6, 873, 5635, 7393

['297', '6515', '5045', '9295', 'z', 'd', '4183', 'a', 'I', '9595', '957', '5687', 'r', 't', 'N', '8997', '8289', '4897', 'u', '4199', '2449', '5275']
297, 6515, 5045, 9295, 26, 4, 4183, 1, 9, 9595, 957, 5687, 18, 20, 14, 8997, 8289, 4897, 21, 4199, 2449, 5275

['1637', '3325', '7435', '5111', 'B']

1637, 3325, 7435, 5111, 2