Co hoi trung $$$$$$$$$$$$$$$$$$$$ day. tra loi truoc 15 phut trung 30 cai k va ti phu $$$
cho phep tru co so tru la so co 3 chu so , so bi tru bang 9 lan so tru. neu viet them chu so 1vao ben trai so tru thi duoc so bi tru. tim so tru do
Nhanh tay len nha. ti phu $$$$$$$$