#include <iostream>
#define MAXSIZE 100
#define OK 1
#define ERROR 0
#define OVERFLOW -2
using namespace std;
typedef struct
{
char *base;
char *top;
int stacksize;
}SqStack;
int InitStack(SqStack &S)
{//初始化栈
S.base=new char[MAXSIZE];
if(!S.base) return OVERFLOW;
S.top=S.base;
S.stacksize=MAXSIZE;
return OK;
}
int Push(SqStack &S)
{//入栈
S.top++;
return OK;
}
int Pop(SqStack &S)
{//出栈
S.top--;
return OK;
}
int IsEmpty(SqStack S)
{//判断栈是否为空，空返回1，否则返回0
return S.top==S.base;
}
bool Judge(char a[],SqStack &S)
{//栈的可操作判断
/**************begin************/
/**************end************/
}
int main()
{
char a[100];
while(cin>>a)
{
if(a[0]=='0') break;
SqStack op;
InitStack(op);
if(Judge(a,op)) cout<<"TRUE"<<endl;
else cout<<"FALSE"<<endl;
}
return 0;
}