non-subscript[,subscript,]non-subscript

non-subscript[,subscript
subscript,]non-subscript

non-subscript[,subscript[,subscript,]non-subscript

non-subscript[,subscript,]non-subscript,]non-subscript

non-subscript[,subscript[,subscript,]non-subscript,]non-subscript

empty: [,,]

no non-block syntax: ,non-subscript,
