import java.util.List;
import java.util.ArrayList;
public class Main {
public static void main
(String[] args
) { List<List<Character>> maze = new ArrayList<List<Character>>();
List<Character> aRow = new ArrayList<Character>();
aRow.add('a');
aRow.add('b');
aRow.add('c');
maze.add(aRow);
List<Character> anotherRow = new ArrayList<Character>();
anotherRow.add('d');
anotherRow.add('e');
anotherRow.add('f');
maze.add(anotherRow);
for (List<Character> row: maze) {
}
}
}
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