1     1   *** begin external enclosure 
    23     1
    23    14
    24    14
    24    15
    25    15
    25    16
    26    16
    26    17
    29    17
    29    18
    31    18
    31    26
    23    26
    23    27
    22    27
    22    28
    23    28
    23    35
    29    35
    29    43
    22    43
    22    47
    23    47
    23    49
    30    49
    30    55
    28    55
    28    56
    24    56
    24    57
    23    57
    23    60
    28    60
    28    63
    21    63
    21    68
    26    68
    26    81
     1    81
     1     1   *** end external grid enclosure