Substitute each of the capital letters in bold by a different digit from 0 to 9, such that each of the columns, each of the rows and each of the two main diagonals of this 5x5 grid have the same sum, where none of the numbers in the 25 cells contains a leading zero.

TI    KT    NS    OB    UL
CN   IO    CC    UK    TB
IU    OL    UI    SC    CS
OK   UB    TL    KO    IT
NC   TK    KU    NN   OI