One day, Regro received a letter from Mash which delighted him with details of Mash's recent experiences. However, the contents of the letter were not what Regro had expected from school life. They were full of danger, surprises, and much confusion.
These walls are one meter thick
and are impervious to all magic.
.هذه الجدران بسمك متر ومنيعة ضدّ كلّ سحر
Die Mauern sind einen Meter dick
und magieabweisend.
Tienen un metro de grosor
y soportan cualquier hechizo.
Tienen un metro de grosor
y soportan cualquier hechizo.
Avec un mètre d’épaisseur,
ये दीवारें एक मीटर मोटी हैं और
इन पर किसी भी प्रकार का जादू काम नहीं करता।
Quei muri sono spessi un metro
 e possono anche resistere alle...
O muro tem 1 metro de espessura...
Тут же стены толщиной в метр…
причём они отражают любую магию!