Mass matrix:
Mat Object: 1 MPI process
  type: seqaij
row 0: (0, 239.836) 
row 1: (1, 239.836) 
row 2: (2, 239.836) 
row 3: (3, 239.836) 
row 4: (4, 239.836) 
row 5: (5, 239.836) 
row 6: (6, 0.000239836) 
row 7: (7, 0.000239836) 
row 8: (8, 0.000239836) 
row 9: (9, 2.39836e-08) 
row 10: (10, 2.39836e-08) 
row 11: (11, 2.39836e-08) 
row 12: (12, 0.000239836) 
row 13: (13, 0.000239836) 
row 14: (14, 0.000239836) 
row 15: (15, 2.39836e-08) 
row 16: (16, 2.39836e-08) 
row 17: (17, 2.39836e-08) 
row 18: (18, 239.836) 
row 19: (19, 239.836) 
row 20: (20, 239.836) 
row 21: (21, 239.836) 
row 22: (22, 239.836) 
row 23: (23, 239.836)