round time base top cost y
     1    1   no yes  low 3
     1    1   no yes high 4
     1    2  yes yes  low 4
     1    2  yes yes high 3
     1    3  yes  no  low 2
     1    3  yes  no high 4
     1    4   no  no  low 1
     1    4   no  no high 1
     2    1  yes yes  low 4
     2    1  yes yes high 4
     2    2   no  no high 2
     2    2   no  no  low 1
     2    3   no yes high 4
     2    3   no yes  low 3
     2    4  yes  no  low 1
     2    4  yes  no high 3
     3    1  yes  no high 1
     3    1  yes  no  low 3
     3    2   no yes  low 3
     3    2   no yes high 3
     3    3   no  no high 1
     3    3   no  no  low 1
     3    4  yes yes  low 4
     3    4  yes yes high 4
     4    1   no  no high 1
     4    1   no  no  low 3
     4    2  yes  no  low 1
     4    2  yes  no high 2
     4    3  yes yes high 4
     4    3  yes yes  low 4
     4    4   no yes  low 4
     4    4   no yes high 4