qH
2
 nifzlTLaeWxTD
0
 WlwbRjvrOZakKXqecEdlrCnmvXQtLKBsy
5
 LiqWMLEULRhW
1
 kGqopTbelcDUcoZgnnRYXgPCRQwSLoqeIByFWDI
26
 DuFhhnq
4
 aaaaAaaaaaaAAaaAaaAaAaaaAaaaaaAAaaAAAAAaaAaAAAAaAA
4
 VtQISIHREYaEGPustEkzJRN
20
 aaaaaaAAAaaaaAaaAaaAaaaaAAaAAAaaAAaaaAAaaaaaAaaAAa
2
 uehLuNwrjO
0
 MDJivQRiOIVRcCdkSuUlNbMEOkIVJRMTAnHbkVaOmOblLfignh
25
 isfvbcBEEPaXUDhbVhwddjEutVQqNdlimIKjUnajDQ
2
 BCABcbacbcbAAACCabbaccAabAAaaCCBcBAcCcbaABCCAcCb
4
 IOJRIQefPFxpUj
18
 RvpuYTxsbDiJDOLauRlfatcfwvtnDzKyaewGrZ
22
 fQHHXCdeaintxHWcFcaSGWFvqnYMEByMlSNKumiFgnJB
0
 cdccAAaBBAADdaCDBbDcaDDabdadAbBccCCCDDBADDcdAdC
4
 R
26
 sPWSFWWqZBPon
3
 abcdefabc
3
 SICNEaKsjCnvOEcVqFHLIC
16
 abczxy
0
 sm
26
 fBUycJpfGhsfIVnXAovyoDyndkhv
9
 TtQEIg
24
 vPuebwksPlxuevRLuWcACTBBgVnmcAUsQUficgEAhoEm
9
 GnlFOqPeZtPiBkvvLhaDvGPgFqBTnLgMT
12
 Ik
3
 VWOibsVSFkxPCmyZLWIOxFbfXdlsNzxVcUVf
8
 gfSAltDEjuPqEsOFuiTpcUpCOiENCLbHHnCgvCQtW
13
 fgWjSAlPOvcAbCdDEFjz
7
 pFgLGSkFnGpNKALeDPGlciUNTTlCtAPlFhaIRutCFaFo
24
 cefEDAbedffbaCcEDfEeCEaAcCeFCcEabEecdEdcaFFde
4
 WHbBHzhSNkCZOAOwiKdu
17
 RtsUOGkraqKyjTktAXloOEmQj
18
 LdsmfiNFkPfJgRxytsSJMQZnDTZZ
11
 xedzyPU
13
 bBbAbbbbaaAAAaabbBbaaabBaaaBaBbAaBabaAAAaaaaBabbb
4
 HXyXuYceFtVUMyLqi
21
 tAjlldiqGZUayJZHFQHFJVRukaIKepPVucrkyPtMrhIXoxZbw
12
 EcCEECdCEBaaeCBEBbAaCAeEdeCEedCAdDeEbcACdCcCCd
4
 hQfrRArEPuVAQGfcSuoVKBKvY
22
 jWBVk
17

qh nifzltlaewxtd wlwBrjvrozAkkxqECEDlrCnmvxqtlkBsy liqwmleulrhw KGQOPTBELCDUCOZGNNRYXGPCRQWSLOQEIBYFWDI Dufhhnq AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA vTQISIHREyAEGPuSTEKzJRN AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA uehlunwrjo MDJIVQRIOIVRCCDKSUULNBMEOKIVJRMTANHBKVAOMOBLLFIGNH isfvBcBeepAxudhBvhwddjeutvqqndlimikjunAjdq BCABCBACBCBAAACCABBACCAABAAAACCBCBACCCBAABCCACCB IOJRIQEFPFxPuJ RVPUyTxSBDIJDOLAURLFATCFwVTNDzKyAEwGRz fqhhxcdeaintxhwcfcasgwfvqnymebymlsnkumifgnjb CDCCAAABBAADDACDBBDCADDABDADABBCCCCCDDBADDCDADC R spwsfwwqzBpon ABCdefABC sICNEAKsJCNvOECvqFHLIC abczxy SM FBuyCjpFGHsFIvnxAovyoDynDkHv TTQEIG vpuEBwksplxuEvrluwCACtBBGvnmCAusquFICGEAHoEm GnLFoqpEztpIBKvvLHADvGpGFqBtnLGmt ik vwoiBsvsFkxpCmyzlwioxFBFxDlsnzxvCuvF GFsALtDEJupqEsoFuItpCupCoIEnCLBHHnCGvCqtw FGwjsAlpovCABCDDEFjz PFGLGSKFNGPNKALEDPGLCIUNTTLCTAPLFHAIRUTCFAFO CefeDABeDffBACCeDfeeCeAACCefCCeABeeCDeDCAffDe wHBBHzHsNKCzOAOwIKDu RtsuOGKRAQKyJtKtAxLOOEMQJ lDsmFInFKpFJGrxytssJmqznDtzz xEDzypu BBBABBBBAAAAAAABBBBAAABBAAABABBAABABAAAAAAAABABBB HxyxUyCEFTvUMyLQI tAJLLDIqGzuAyJzHFqHFJvruKAIKEppvuCrKyptmrHIxoxzBw eCCeeCDCeBAAeCBeBBAACAeeDeCeeDCADDeeBCACDCCCCD HQFRRAREPUVAQGFCSUOVKBKVy JwBvK
#include <bits/stdc++.h>
using namespace std;
inline long long readInt() {
  register int c = getchar();
  long long x = 0, neg = 0;
  for (; ((c < 48 || c > 57) && c != '-'); c = getchar())
    ;
  if (c == '-') {
    neg = 1;
    c = getchar();
  }
  for (; c > 47 && c < 58; c = getchar()) x = (x << 1) + (x << 3) + c - 48;
  return (neg) ? -x : x;
}
inline void printInt(long long x) {
  char pri[30];
  int i = 0;
  if (x < 0) {
    putchar('-');
    x = -x;
  }
  do {
    pri[i++] = (x % 10) + 48;
    x /= 10;
  } while (x != 0);
  for (int j = (i - 1); j > (0 - 1); j -= 1) putchar(pri[j]);
}
void solve() {
  string s;
  int n;
  cin >> s >> n;
  for (char *i = &s[0]; *i; i++) {
    if (*i < 'a') *i += 'a' - 'A';
    if (*i < n + 97) *i += 'A' - 'a';
  }
  cout << s << endl;
}
int main() {
  if (0) {
    double _time = clock();
    freopen("input.txt", "r", stdin);
    solve();
    printf("%0.4f sec\n", (clock() - _time) / CLOCKS_PER_SEC);
    return 0;
  }
  solve();
  return 0;
}
