Letters that make concurrent execution
o, e, n, c, r, t, i, u, x are letters that make 'concurrent execution'
Words within concurrent execution
re, ti, cur, NT, EXEC, EC, en, ut, cut, current, ex, on, concurrent, con, execution, rent, Ur, CO, NC, Io, ion, Re, Co, Cu, Ti, Xe, UT, concur are words within 'concurrent execution'