#include <bits/stdc++.h>   using namespace std;   int main() {     string s1, s2, s3;     long long a = 0, b = 0, c = 0;     string unia;     cin >> s1 >> s2 >> s3;     long long *trm1, *trm2;     string *uni;     uni = &unia;     if (s1[0] ==  A )       trm1 = &a;     else if (s1[0] ==  B )       trm1 = &b;     else if (s1[0] ==  C )       trm1 = &c;     if (s1[2] ==  A )       trm2 = &a;     else if (s1[2] ==  B )       trm2 = &b;     else if (s1[2] ==  C )       trm2 = &c;     if (s1[1] ==  > ) {       *uni += s1[0];       *trm1 = *trm2 + 1 + *trm1;     } else if (s1[1] ==  < ) {       *uni += s1[2];       *trm2 = *trm1 + 1 + *trm2;     }     if (s2[0] ==  A )       trm1 = &a;     else if (s2[0] ==  B )       trm1 = &b;     else if (s2[0] ==  C )       trm1 = &c;     if (s2[2] ==  A )       trm2 = &a;     else if (s2[2] ==  B )       trm2 = &b;     else if (s2[2] ==  C )       trm2 = &c;     if (s2[1] ==  > ) {       *uni += s2[0];       *trm1 = *trm2 + 1 + *trm1;     } else if (s2[1] ==  < ) {       *uni += s2[2];       *trm2 = *trm1 + 1 + *trm2;     }     if (s3[0] ==  A )       trm1 = &a;     else if (s3[0] ==  B )       trm1 = &b;     else if (s3[0] ==  C )       trm1 = &c;     if (s3[2] ==  A )       trm2 = &a;     else if (s3[2] ==  B )       trm2 = &b;     else if (s3[2] ==  C )       trm2 = &c;     if (s3[1] ==  > ) {       *uni += s3[0];       *trm1 = *trm2 + 1 + *trm1;     } else if (s3[1] ==  < ) {       *uni += s3[2];       *trm2 = *trm1 + 1 + *trm2;     }     long long unicnt = 0;     long long repcnt = 0;     for (long long i = 0; i < 3; i++) {       if (i == 0)         unicnt++;       else {         long long j;         for (j = i - 1; j >= 0; j = j - 1) {           if (unia[i] == unia[j]) {             repcnt++;             break;           }         }         if (j < 0) unicnt++;       }     }     if (repcnt != 1) {       cout <<  Impossible  << endl;     } else {       vector<pair<long long, char>> m;       m.push_back(make_pair(a,  A ));       m.push_back(make_pair(b,  B ));       m.push_back(make_pair(c,  C ));       sort(m.begin(), m.end());       for (long long i = 0; i < m.size(); i++) {         cout << m[i].second;       }     }     return 0;   }   