Find gcd(F6,F5)\text{gcd}(F_6, F_5)gcd(F6,F5) where FnF_nFn is the nnn-th Fibonacci number (F1=1,F2=1,F3=2,F4=3,F5=5,F6=8F_1=1, F_2=1, F_3=2, F_4=3, F_5=5, F_6=8F1=1,F2=1,F3=2,F4=3,F5=5,F6=8).
111
222
333
555