/*
   ACM North Central Region, 1993-94
   Problem B, Identifying Legal Pascal Real constants

   Ed Karrels, March 1996
*/

#include <stdio.h>

int ReadThrough(char *match, int echo, char *dest) {
   int c, num;

   num = 0;
   while (1) {
      c = getchar();
      if (!strchr(match, c)) {
	 ungetc(c, stdin);
	 if (dest) *dest = 0;
	 return num;
      }
      if (echo) putchar(c);
      if (dest) *dest++ = c;
      num++;
   }
}

int IsGood() {
   int hasdec=0, hasexp=0;
   int n;
   char temp[1000];

   ReadThrough(" \t", 0, 0);
   if (ReadThrough("*", 0,0)) return -1;
   if (ReadThrough("-+",1,0) > 1) return 0;
   if (ReadThrough("0123456789",1,0) == 0) return 0;

   n = ReadThrough(".",1,0);
   if (n>1) return 0;
   if (n) {
      hasdec = 1;
      if (ReadThrough("0123456789",1,0) == 0) return 0;
   }
   n = ReadThrough("eE",1,0);
   if (n>1) return 0;
   if (n) {
      hasexp = 1;
      if (ReadThrough("+-",1,0)>1) return 0;
      if (ReadThrough("0123456789",1,0) == 0) return 0;
   }
   ReadThrough(" \t", 0, temp);
   n = getchar();
   ungetc(n, stdin);
   if (n != '\n') {
      printf("%s", temp);
      return 0;
   }

   if (!hasexp && !hasdec) return 0;

   return 1;
}

void FinishLine() {
   int c;
   c = getchar();
   while (c != '\n') {
      putchar(c);
      c = getchar();
   }
}

int main() {
   int isgood;

   while (-1 != (isgood = IsGood())) {
      if (isgood) {
	 FinishLine();
	 printf(" is legal.\n");
      } else {
	 FinishLine();
	 printf(" is illegal.\n");
      }
   }
   
   return 0;
}