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;
char str[55];
int len, num;
int main() {
  while (scanf("%s%d", str, &num) != EOF) {
    len = strlen(str);
    char ans[55];
    for (int i = 0; i < len; i++) {
      int x = str[i];
      if (x >= 'a')
        x -= 'a';
      else
        x -= 'A';
      x += 'a';
      if (x < 97 + num)
        ans[i] = x - 'a' + 'A';
      else
        ans[i] = x - 'a' + 'a';
    }
    ans[len] = '\0';
    printf("%s\n", ans);
  }
  return 0;
}
