package contest; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.InputMismatchException; public class Q600 { InputStream is; PrintWriter out; String INPUT = ""; void solve() { int n = ni(), m = ni(); char[][] map = nm(n,m); int mod = 1000000007; // 1010 long ret = 1; out: for(int j = 0;j < n;j++){ int par = -1; for(int i = 0;i < m;i++){ if(map[j][i] != '?'){ if(par == -1){ par = ((map[j][i]-'0')^i)&1; }else{ int v = ((map[j][i]-'0')^i)&1; if(v != par){ ret = 0; break out; } } } } if(par == -1){ ret = ret * 2 % mod; } } long plus = 1; int[] pars = new int[m]; out: for(int i = 0;i < m;i++){ int par = -1; for(int j = 0;j < n;j++){ if(map[j][i] != '?'){ if(par == -1){ par = ((map[j][i]-'0')^j)&1; }else{ int v = ((map[j][i]-'0')^j)&1; if(v != par){ plus = 0; break out; } } } } pars[i] = par; if(par == -1){ plus = plus * 2 % mod; } } if(plus > 0){ plus -= 2; for(int i = 0;i < m;i++){ if(pars[i] != -1 && ((pars[i]^i)&1) == 0){ plus++; break; } } for(int i = 0;i < m;i++){ if(pars[i] != -1 && ((pars[i]^i)&1) == 1){ plus++; break; } } } ret += plus; ret %= mod; if(ret < 0)ret += mod; out.println(ret); } void run() throws Exception { is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes()); out = new PrintWriter(System.out); long s = System.currentTimeMillis(); solve(); out.flush(); if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms"); } public static void main(String[] args) throws Exception { new Q600().run(); } private byte[] inbuf = new byte[1024]; private int lenbuf = 0, ptrbuf = 0; private int readByte() { if(lenbuf == -1)throw new InputMismatchException(); if(ptrbuf >= lenbuf){ ptrbuf = 0; try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); } if(lenbuf <= 0)return -1; } return inbuf[ptrbuf++]; } private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); } private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; } private double nd() { return Double.parseDouble(ns()); } private char nc() { return (char)skip(); } private String ns() { int b = skip(); StringBuilder sb = new StringBuilder(); while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ') sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } private char[] ns(int n) { char[] buf = new char[n]; int b = skip(), p = 0; while(p < n && !(isSpaceChar(b))){ buf[p++] = (char)b; b = readByte(); } return n == p ? buf : Arrays.copyOf(buf, p); } private char[][] nm(int n, int m) { char[][] map = new char[n][]; for(int i = 0;i < n;i++)map[i] = ns(m); return map; } private int[] na(int n) { int[] a = new int[n]; for(int i = 0;i < n;i++)a[i] = ni(); return a; } private int ni() { int num = 0, b; boolean minus = false; while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-')); if(b == '-'){ minus = true; b = readByte(); } while(true){ if(b >= '0' && b <= '9'){ num = num * 10 + (b - '0'); }else{ return minus ? -num : num; } b = readByte(); } } private long nl() { long num = 0; int b; boolean minus = false; while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-')); if(b == '-'){ minus = true; b = readByte(); } while(true){ if(b >= '0' && b <= '9'){ num = num * 10 + (b - '0'); }else{ return minus ? -num : num; } b = readByte(); } } private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); } }