C7:C4 SmallGroup(28, 1)

[28 9 5 2]: [f2, f3, f3^2, f3^3, f3^4, f3^5, f3^6, f1*f3^6, f1*f2*f3^6]
            [3, 4, 8, 12, 16, 20, 24, 26, 28]

[28 15 14 2]: [f1, f2, f1*f2, f1*f3, f1*f2*f3, f1*f3^2, f1*f2*f3^2, f1*f3^3, f1*f2*f3^3, f1*f3^4, f1*f2*f3^4, f1*f3^5, f1*f2*f3^5, f1*f3^6, f1*f2*f3^6]
              [2, 3, 5, 6, 9, 10, 13, 14, 17, 18, 21, 22, 25, 26, 28]

[28 19 15 12]: [f1, f2, f3, f1*f2, f1*f3, f3^2, f1*f2*f3, f1*f3^2, f3^3, f1*f2*f3^2, f1*f3^3, f3^4, f1*f2*f3^3, f1*f3^4, f3^5, f1*f2*f3^4, f1*f3^5, f3^6, f1*f2*f3^5]
               [2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 14, 16, 17, 18, 20, 21, 22, 24, 25]

[28 25 24 22]: [f1, f2, f3, f1*f2, f1*f3, f2*f3, f3^2, f1*f2*f3, f1*f3^2, f2*f3^2, f3^3, f1*f2*f3^2, f1*f3^3, f2*f3^3, f3^4, f1*f2*f3^3, f1*f3^4, f2*f3^4, f3^5, f1*f2*f3^4, f1*f3^5, f2*f3^5, f3^6, f1*f2*f3^5, f2*f3^6]
               [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27]