I want to improve the lines of this code. Specifically, the part where I convert all the strings values to integers. I want to reduce that line to a simpler one.

```
import sys

def main():
    try:

        A,B,C,D =input("Enter values A,B,C,D separated by a comma: ").split(",")

        A=int(A) # These lines convert all the values into integers.
        B=int(B)
        C=int(C)
        D=int(D)

        print("Accepted values") if (A>0 and B>0 and C>0 and D>0 and A%2==0 and B>C and C>D and C+D > A+B) else print("Non-accepted values")

    except ValueError:  
        sys.exit("Invalid input. You have not entered integer values correctly separated by a comma.\n Program ends.") 

if __name__== "__main__" :          
    main()

```