a,b,c = map(int,input().split());
# a>b>c
if a < b:
    t=a
    a=b
    b=t 
if a < c:
    t=a
    a=c
    c=t 
if b < c:
    t=b
    b=c
    c=t
if a-b==1 and b-c==1:
    print('TRUE')
else :
    print('FALSE')
/**************************************************************
	Problem: 1041
	User: admin
	Language: Python
	Result: Accepted
	Time:231 ms
	Memory:34480 kb
****************************************************************/