def f(l): if len(l) == 1: return l[0] == 24 else: for i in range(len(l)): m = l.copy() m.pop(i) for j in range(len(m)): n = m.copy() n.pop(j) if m[j] == 0: continue else: a = l[i]+m[j] b = l[i]-m[j] c = l[i]*m[j] d = l[i]/m[j] if f(n+[a]) or f(n+[b]) or f(n+[c]) or f(n+[d]): return True l = list(map(int, input().split())) if f(l): print('true') else: print('false')