import java.io.IOException; import java.io.InputStream; import java.util.Arrays; import java.util.NoSuchElementException; class Main { public static void main(String[] args) { // long time = System.currentTimeMillis(); new Main().run(); // System.err.println(System.currentTimeMillis() - time); } final long MOD = 1_000_000_000 + 7; void run() { Scanner sc = new Scanner(); String s = sc.next(); int n = s.length(); long[] f = new long[(n + 1) / 2]; Arrays.fill(f, 1); for (int i = 0; i < (n + 1) / 2; ++i) { String t = s.substring((n - 1) / 2 - i, n / 2 + i + 1); int pos = i; int[] h = zalgo(t); for (int j = (t.length() + 1) / 2; j < t.length(); ++j) { int len = t.length() - j; if (h[j] != len) continue; if (pos - len == -1) { f[pos] = (f[pos] + 1); } else f[pos] = (f[pos] + f[pos - len]); if (f[pos] >= MOD) f[pos] -= MOD; } } System.out.println(f[f.length - 1]); } int[] zalgo(String s) { int n = s.length(); int[] ret = new int[n]; ret[0] = n; int i = 1, j = 0; while (i < n) { while (i + j < n && s.charAt(j) == s.charAt(i + j)) ++j; ret[i] = j; if (j == 0) { ++i; continue; } int k = 1; while (i + k < n && k + ret[k] < j) { ret[i + k] = ret[k]; ++k; } i += k; j -= k; } return ret; } class Scanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; } else { ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1; } private boolean isPrintableChar(int c) { return 33 <= c && c <= 126; } public boolean hasNext() { while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while (true) { if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; } else if (b == -1 || !isPrintableChar(b)) { return minus ? -n : n; } else { throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { long nl = nextLong(); if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) nl; } public double nextDouble() { return Double.parseDouble(next()); } } void tr(Object... objects) { System.out.println(Arrays.deepToString(objects)); } }