#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using db = long double;
using ch = char;
using bl = bool;
using st = string;
using pll = pair<ll,ll>;
using psl = pair<st,ll>;
using vst = vector<st>;
using vch = vector<ch>;
using vvch = vector<vch>;
using vbl = vector<bl>;
using vvbl = vector<vbl>;
using vdb = vector<db>;
using vpll = vector<pll>;
using vvpll = vector<vpll>;
using vpsl = vector<psl>;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vvvvi = vector<vvvi>;
using vll = vector<ll>;
using vvll = vector<vll>;
using vvvll = vector<vvll>;
using vvvvll = vector<vvvll>;
using vvvvvll = vector<vvvvll>;
template <class T> using pq = priority_queue<T>;
template <class T> using pqg = priority_queue<T,vector<T>,greater<T>>;
#define all(A) A.begin(),A.end()
#define sz(A) (ll)A.size()
#define pb(a) push_back(a)
#define mp(a,b) make_pair(a,b)
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
#define rrep(i,a,b) for(ll i=(ll)(a);i<=(ll)(b);i++)
#define drep(i,n) for(ll i=(ll)n-1; i>=0; i--)
#define drrep(i,a,b) for(ll i=(ll)a; i>=(ll)b; i--)

using mint = modint998244353;
// using mint = modint1000000007;
using vm = vector<mint>;
using vvm = vector<vm>; 
using vvvm = vector<vvm>;

const ll mod = 998244353;
const ll INF = 3e18;

template<class T> inline bool chmin(T &a, T b)
{
    if (a>b)
    {
        a=b;
        return true;
    }
    return false;
}

template<class T> inline bool chmax(T &a, T b)
{
    if (a<b)
    {
        a=b;
        return true;
    }
    return false;
}

ll gcd(ll a, ll b)
{
    if (a==0)return b;
    if (b==0)return a;
    ll c=a;
    while(a%b!=0)
    {
        c=a%b;
        a=b;
        b=c;
    }
    return b;
}

ll lcm(ll a,ll b){
    return a/gcd(a,b)*b;
}

ll Pow(ll a, ll n)
{
    ll res=1;
    while(n>0)
    {
        if(n%2==1)res*=a;
        a*=a;
        n/=2;
    }
    return res;
}

ll Pow(ll a, ll n, ll p)
{
    ll res=1;
    while(n>0)
    {
        a%=p;
        if(n%2==1)res*=a;
        a*=a;
        res%=p;
        n/=2;
    }
    return res;
}

void yn(bl ok)
{
    cout << (ok?"Yes":"No") << endl;
    return;
}

ll H,W,K;
ch C[101][101];
mint dp[101][101][201];

int main()
{
    cin>>H>>W>>K;
    K--;
    rrep(i,1,H)rrep(j,1,W)cin>>C[i][j];
    dp[1][1][0]=1;
    rrep(i,1,H)rrep(j,1,W)if(i>1||j>1)if(C[i][j]!='#')
    {
        if(C[i][j]=='.')
        {
            rrep(k,0,K)dp[i][j][k]+=dp[i-1][j][k]+dp[i][j-1][k];
        }
        else
        {
            rrep(k,1,K)dp[i][j][k]+=dp[i-1][j][k-1]+dp[i][j-1][k-1];
        }
    }
    mint ans=0;
    rrep(k,0,K)ans+=dp[H][W][k];
    cout << ans.val() << endl;
    return 0;
}