Set1: 2, ['P', 't']
Set2: 4, ['G', 'g', 'i', 'm']
Set3: 3, ['R', 'W', 'l']
Set4: 4, ['S', 'p', 'u', 'v']
Set1 and Set2: 1, ['H']
Set1 and Set3: 1, ['y']
Set1 and Set4: 0, []
Set2 and Set3: 0, []
Set2 and Set4: 0, []
Set3 and Set4: 1, ['s']
Set1 and Set2 and Set3: 1, ['o']
Set1 and Set2 and Set4: 1, ['r']
Set1 and Set3 and Set4: 0, []
Set2 and Set3 and Set4: 1, ['n']
Set1 and Set2 and Set3 and Set4: 3, [' ', 'a', 'e']
