//start of jonathanirvings' template v3.0.3 (BETA) #include using namespace std; typedef long long LL; typedef pair pii; typedef pair pll; typedef pair pss; typedef vector vi; typedef vector vvi; typedef vector vii; typedef vector vl; typedef vector vvl; double EPS = 1e-9; int INF = 1000000005; long long INFF = 1000000000000000005LL; double PI = acos(-1); int dirx[8] = {-1,0,0,1,-1,-1,1,1}; int diry[8] = {0,1,-1,0,-1,1,-1,1}; #ifdef TESTING #define DEBUG fprintf(stderr,"====TESTING====\n") #define VALUE(x) cerr << "The value of " << #x << " is " << x << endl #define debug(...) fprintf(stderr, __VA_ARGS__) #else #define DEBUG #define VALUE(x) #define debug(...) #endif #define FOR(a,b,c) for (int (a)=(b);(a)<(c);++(a)) #define FORN(a,b,c) for (int (a)=(b);(a)<=(c);++(a)) #define FORD(a,b,c) for (int (a)=(b);(a)>=(c);--(a)) #define FORSQ(a,b,c) for (int (a)=(b);(a)*(a)<=(c);++(a)) #define FORC(a,b,c) for (char (a)=(b);(a)<=(c);++(a)) #define FOREACH(a,b) for (auto &(a) : (b)) #define REP(i,n) FOR(i,0,n) #define REPN(i,n) FORN(i,1,n) #define MAX(a,b) a = max(a,b) #define MIN(a,b) a = min(a,b) #define SQR(x) ((LL)(x) * (x)) #define RESET(a,b) memset(a,b,sizeof(a)) #define fi first #define se second #define mp make_pair #define pb push_back #define ALL(v) v.begin(),v.end() #define ALLA(arr,sz) arr,arr+sz #define SIZE(v) (int)v.size() #define SORT(v) sort(ALL(v)) #define REVERSE(v) reverse(ALL(v)) #define SORTA(arr,sz) sort(ALLA(arr,sz)) #define REVERSEA(arr,sz) reverse(ALLA(arr,sz)) #define PERMUTE next_permutation #define TC(t) while(t--) inline string IntToString(LL a){ char x[100]; sprintf(x,"%lld",a); string s = x; return s; } inline LL StringToInt(string a){ char x[100]; LL res; strcpy(x,a.c_str()); sscanf(x,"%lld",&res); return res; } inline string GetString(void){ char x[1000005]; scanf("%s",x); string s = x; return s; } inline string uppercase(string s){ int n = SIZE(s); REP(i,n) if (s[i] >= 'a' && s[i] <= 'z') s[i] = s[i] - 'a' + 'A'; return s; } inline string lowercase(string s){ int n = SIZE(s); REP(i,n) if (s[i] >= 'A' && s[i] <= 'Z') s[i] = s[i] - 'A' + 'a'; return s; } inline void OPEN (string s) { #ifndef TESTING freopen ((s + ".in").c_str (), "r", stdin); freopen ((s + ".out").c_str (), "w", stdout); #endif } //end of jonathanirvings' template v3.0.3 (BETA) LL MOD = 1e9 + 7; LL modpow(LL a, LL b) { if (b == 0) return 1; LL tmp = modpow(a,b/2); LL tmp2 = tmp * tmp % MOD; if (b % 2 == 0) return tmp2; return tmp2 * a % MOD; } LL inv(LL a) {return modpow(a,MOD-2);}; int q; string s; int n; int ada[27][100005]; LL f[100005]; LL invf[100005]; int L,R; int main() { s = GetString(); n = SIZE(s); f[0] = 1; invf[0] = inv(f[0]); FORN(i,1,n) { f[i] = f[i-1] * i % MOD; invf[i] = inv(f[i]); } REPN(i,n) { ada[s[i-1] - 'a'][i]++; REP(j,26) ada[j][i] += ada[j][i-1]; } scanf("%d",&q); TC(q) { scanf("%d %d",&L,&R); int ganjil = 0; vi genap; REP(j,26) { int cnt = ada[j][R] - ada[j][L-1]; genap.pb(cnt/2); if (cnt & 1) ganjil++; } LL risan = (ganjil == 0 ? 1 : ganjil); // debug("%d %d\n",ganjil.fi,ganjil.se); LL jum = 0; REP(i,SIZE(genap)) jum += genap[i]; risan = risan * f[jum] % MOD; REP(i,SIZE(genap)) risan = risan * invf[genap[i]] % MOD; printf("%lld\n",risan); } return 0; }