#include <bits/stdc++.h>   using namespace std;   int main() {     char next;     long long int neg = 0, pos = 0;     cin >> next;     bool estado = false;     string orden =   ;     while (next !=  = ) {       if (next ==    ) {         cin >> next;       }       if (next ==  - ) {         estado = true;         cin >> next;       }       if (next ==  + ) {         estado = false;         cin >> next;       }       if (next ==  ? ) {         if (estado) {           orden +=  - ;           neg++;         } else {           orden +=  + ;           pos++;         }       }       cin >> next;     }     long long int num;     cin >> num;     long long int coefs[neg + pos];     if ((neg > ((pos - 1) * num)) || ((pos - neg * num) > num)) {       cout <<  Impossible ;       return 0;     }     long long int valpos = 0, valneg = 0;     cout <<  Possible  << endl;     if (neg == 0) {       long long int cv = trunc(num / pos);       long long int sum = 0;       for (int i = 0; i < pos; i++) {         coefs[i] = cv;       }       sum = cv * pos - num;       if (sum != 0) {         for (int i = 0; i < pos; i++) {           coefs[i]++;           sum++;           if (sum == 0) break;         }       }       cout << coefs[0];       for (int i = 1; i < pos; i++) {         cout <<   +   << coefs[i];       }       cout <<   =   << num;       return 0;     }     if (pos - 1 > neg) {       valpos = 1;       valneg = trunc((pos - 1) / neg);     } else {       valneg = 1;       valpos = trunc(neg / (pos - 1));     }     int ref;     for (int i = 0; i < orden.size(); i++) {       if (orden[i] ==  - ) {         coefs[i] = -valneg;       } else         coefs[i] = valpos;     }     coefs[0] = num;     long long int suma = 0;     for (int i = 0; i < neg + pos; i++) {       suma += coefs[i];     }     suma -= num;     if (suma < 0) {       for (int i = 1; i < neg + pos; i++) {         if (coefs[i] > 0 && (abs(coefs[i]) < num)) {           coefs[i]++;           suma++;         }         if (suma == 0) break;       }     }     if (suma > 0) {       for (int i = 1; i < neg + pos; i++) {         if (coefs[i] < 0 && (abs(coefs[i]) < num)) {           coefs[i]--;           suma--;         }         if (suma == 0) break;       }     }     for (int i = 1; i < neg + pos; i++) {       if (abs(coefs[i]) > num) {         if (coefs[i] < 0) {           suma += -num - coefs[i];           coefs[i] = -num;         } else {           suma += num - coefs[i];           coefs[i] = num;         }       }     }     if (suma > 0) {       coefs[0] -= suma;       suma -= suma;     }     if (suma < 0) {       coefs[0] += suma;       suma -= suma;     }     cout << coefs[0];     for (int i = 1; i < pos + neg; i++) {       if (coefs[i] < 0)         cout <<   -   << abs(coefs[i]);       else         cout <<   +   << coefs[i];     }     cout <<   =   << suma + num;     return 0;   }   