shortened code by avoiding call to `#flatten`
shortened code by avoiding call to `#flatten`

clupascu/codegolf,clupasq/codegolf,wolfascu/codegolf,wolfascu/codegolf,clupasq/codegolf,clupascu/codegolf,clupasq/codegolf,clupasq/codegolf,wolfascu/codegolf,clupascu/codegolf,wolfascu/codegolf