def SimpleSymbols(ytr): magic=ytr if (ord(magic[len(magic)-1]) in range(97,123)) or (ord(magic[len(magic)-1]) in range(65,91)): return "false" for i in range(0,len(magic)): if(ord(magic[i]) in range(97,123)) or (ord(magic[i]) in range(65,91)): if i==0: return str(i)+"false" if ((magic[i-1])!='+') or ((magic[i+1])!='+'): return "false" return "true" # keep this function call here # to see how to enter arguments in Python scroll down print(SimpleSymbols(raw_input()))