N=int(input())
list1=[]
for i in range(N):
    a=int(input())
    list1.append(a)
    
count=0
if abs(list1[0])==1:
    for j in range(1,N):
        if abs(list1[j]-list1[j-1])==1:
            count=count+1
        else:
            count=0
            break

if count>0:
    print("T")
elif count==0:
    print("F")