Hello, i have a flat file like that:

C1L1;C2L1;C3L1;C4L1;C5L1;C6L1;C7L1;C8L1;C9L1;C10L1;C11L1;C12L1;
C1L2;C2L2;C3L2;C4L2;C5L2;C6L2;C7L2;
C1L3;C2L3;C3L3;C4L3;C5L3;C6L3;C7L3;C8L3;C9L3;...