import java.util.List;
import java.util.ArrayList;

public class Solution {                                                                            
      public Object[] flattenOneLevel(Object[] array) {                                              
          ArrayList<Object> result = new ArrayList<>();                                              
          
          for (Object item : array) {                                                                
              if (item instanceof Object[]) {            
                  for (Object inner : (Object[]) item) {                                             
                      result.add(inner);                                                             
                  }                                                                                  
              } else if (item instanceof int[]) {                                                    
                  for (int inner : (int[]) item) {                                                   
                      result.add(inner);                                                             
                  }                                                                                  
              } else {                                                                               
                  result.add(item);                                                                  
              }                                                                                      
          }
                                                                                                     
          return result.toArray();                       
      }
  }