Suppose {a,, a2, ., ap} is a complete residue system module p where p is prime. Prove that for each ne Z and each nonnegative integer s there exists a congruence of the form ...) b;pi mod pst1 j=0 where each b; is one of the a. Suppose {a,, a2, ., ap} is a complete residue system module p where p is prime. Prove that for each ne Z and each nonnegative integer s there exists a congruence of the form ...) b;pi mod pst1 j=0 where each b; is one of the a