For 2 to a 4-binary number n.input n3, n2, n1, n0 represent n. Input K is a control signal. Network must have outputs m3, m2, m1, m0, whith represent 4-bit binary number m. When k=0, m=n+1, when k=1, m=n+2. Suppose that input for which m>1111 will never happen. The input variable will available from switches.