.  Let's assume, that there is an integer $d>0$ such, that $$\textcolor[rgb]{0.00,0.00,0.00}{A\equiv B\equiv 0(mod\,d),\ but\ gcd(C,d)=0}.\label{T0:0}$$ Then it follows from and , that $$\textcolor[rgb]{0.00,0.00,0.00}{0^{0^{k