Cascade for [4], [2, 2, 2, 2]

Singularity types \(K^2\) Orders of local
fundamental groups		 Local indices Index
[2, 2, 2, 2], [4] 5 5, 4 1, 2 2
\(\downarrow\)
[2, 2, 2], [3] 16/3 4, 3 1, 3 3
\(\downarrow\)
[2, 2], [2] 6 3, 2 1, 1 1