public int[] fix34(int[] nums) {
int swap=0;
int s2 = -1;
  for(int i=0;i<nums.length-1;i++){
     if(nums[i] == 4)
        s2 = i;
     if(nums[i]==3){
       swap=nums[i+1];
       if(s2 >= 0) {
          nums[s2] = swap;
          nums[i+1] = 4;
          s2 = -1;
       }else {
       for(int j=i;j<nums.length;j++){
         if(nums[j]==4){
         nums[j]=swap;
         nums[i+1]=4;i++;break;}}}}
  }
return nums;
}