let inpt = readLine()!.map{$0} func getChiwawa(_ cnt:Int, _ startIdx:Int)->Int { var nextChar:Character = "w" if(cnt == 0) { nextChar = "c" } var ret = inpt.count + 1 for i in startIdx..<inpt.count { if(inpt[i] == nextChar) { if(cnt == 2) { return i } else { let tmp = getChiwawa(cnt + 1, i + 1) if(tmp < 0) { continue } if(cnt == 0) { ret = min(ret, tmp - i + 1) } else { return tmp } } } } if(ret > inpt.count) { return -1 } return ret } let ans = getChiwawa(0, 0) print(ans)