t0<t<t1\mathrm{t}_{0}<\mathrm{t}<\mathrm{t}_{1}t0<t<t1
t1<t<t2\mathrm{t}_{1}<\mathrm{t}<\mathrm{t}_{2}t1<t<t2
t2<t<t3t_{2}<t<t_{3}t2<t<t3
t1t_{1}t1 এবং t2t_{2}t2