[5w] [8u]-[8t] [9y] [0u] [8t] [0u] [qi] o---- [8u] [qp]-[*p] [*o] [9i]-[9i] [8i] [7o] [7p] [5o] [5i] [8u]-t [7u] [6o]-[9i] [9u] [5y]---- i [qi] r [0u] [0u] [9i] [0o] [qp] [9i] [5u]-i [qr] [8u]-- u----y-u-u---- i----u-i-y-y---- i----u-i-i---- u----i-u-t