$$\(K, L\)$$ and $$\(M\)$$ are points on the circle. $$\(K S\)$$ is a tangent to the circle at $$\(K\)$$. $$\(K M\)$$ is a diameter and triangle $$\(K L M\)$$ is isosceles. Find the value of $$\(z\)$$. ............................................

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