import java.io.OutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.io.BufferedWriter; import java.util.InputMismatchException; import java.io.IOException; import java.io.Writer; import java.io.OutputStreamWriter; import java.io.InputStream; /** * Built using CHelper plug-in * Actual solution is at the top * * @author Egor Kulikov (egor@egork.net) */ public class Solution { public static void main(String[] args) { InputStream inputStream = System.in; OutputStream outputStream = System.out; InputReader in = new InputReader(inputStream); OutputWriter out = new OutputWriter(outputStream); MaximumPalindromes solver = new MaximumPalindromes(); solver.solve(1, in, out); out.close(); } static class MaximumPalindromes { public void solve(int testNumber, InputReader in, OutputWriter out) { String s = in.readString(); int[][] qty = new int[s.length() + 1][26]; for (int i = 0; i < s.length(); i++) { System.arraycopy(qty[i], 0, qty[i + 1], 0, 26); qty[i + 1][s.charAt(i) - 'a']++; } Combinations c = new Combinations(s.length() + 1, MiscUtils.MOD7); int q = in.readInt(); for (int i = 0; i < q; i++) { int l = in.readInt() - 1; int r = in.readInt(); int odd = 0; int total = 0; long answer = 1; for (int j = 0; j < 26; j++) { int num = qty[r][j] - qty[l][j]; total += num >> 1; answer *= c.c(total, num >> 1); answer %= MiscUtils.MOD7; odd += num & 1; } answer *= Math.max(1, odd); answer %= MiscUtils.MOD7; out.printLine(answer); } } } static class MiscUtils { public static final int MOD7 = (int) (1e9 + 7); } static class Combinations { private final long mod; private final long[] factorial; private final long[] reverseFactorial; public Combinations(int length, long mod) { this.mod = mod; factorial = IntegerUtils.generateFactorial(length, mod); reverseFactorial = IntegerUtils.generateReverseFactorials(length, mod); } public long c(int n, int k) { if (k < 0 || k > n) { return 0; } return factorial[n] * reverseFactorial[k] % mod * reverseFactorial[n - k] % mod; } } static class OutputWriter { private final PrintWriter writer; public OutputWriter(OutputStream outputStream) { writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream))); } public OutputWriter(Writer writer) { this.writer = new PrintWriter(writer); } public void close() { writer.close(); } public void printLine(long i) { writer.println(i); } } static class IntegerUtils { public static long[] generateFactorial(int count, long module) { long[] result = new long[count]; if (module == -1) { if (count != 0) { result[0] = 1; } for (int i = 1; i < count; i++) { result[i] = result[i - 1] * i; } } else { if (count != 0) { result[0] = 1 % module; } for (int i = 1; i < count; i++) { result[i] = (result[i - 1] * i) % module; } } return result; } public static long[] generateReverse(int upTo, long module) { long[] result = new long[upTo]; if (upTo > 1) { result[1] = 1; } for (int i = 2; i < upTo; i++) { result[i] = (module - module / i * result[((int) (module % i))] % module) % module; } return result; } public static long[] generateReverseFactorials(int upTo, long module) { long[] result = generateReverse(upTo, module); if (upTo > 0) { result[0] = 1; } for (int i = 1; i < upTo; i++) { result[i] = result[i] * result[i - 1] % module; } return result; } } static class InputReader { private InputStream stream; private byte[] buf = new byte[1024]; private int curChar; private int numChars; private InputReader.SpaceCharFilter filter; public InputReader(InputStream stream) { this.stream = stream; } public int read() { if (numChars == -1) { throw new InputMismatchException(); } if (curChar >= numChars) { curChar = 0; try { numChars = stream.read(buf); } catch (IOException e) { throw new InputMismatchException(); } if (numChars <= 0) { return -1; } } return buf[curChar++]; } public int readInt() { int c = read(); while (isSpaceChar(c)) { c = read(); } int sgn = 1; if (c == '-') { sgn = -1; c = read(); } int res = 0; do { if (c < '0' || c > '9') { throw new InputMismatchException(); } res *= 10; res += c - '0'; c = read(); } while (!isSpaceChar(c)); return res * sgn; } public String readString() { int c = read(); while (isSpaceChar(c)) { c = read(); } StringBuilder res = new StringBuilder(); do { if (Character.isValidCodePoint(c)) { res.appendCodePoint(c); } c = read(); } while (!isSpaceChar(c)); return res.toString(); } public boolean isSpaceChar(int c) { if (filter != null) { return filter.isSpaceChar(c); } return isWhitespace(c); } public static boolean isWhitespace(int c) { return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1; } public interface SpaceCharFilter { public boolean isSpaceChar(int ch); } } }